CN109788574B - Random access method, user equipment and network equipment - Google Patents
Random access method, user equipment and network equipment Download PDFInfo
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- CN109788574B CN109788574B CN201711132847.5A CN201711132847A CN109788574B CN 109788574 B CN109788574 B CN 109788574B CN 201711132847 A CN201711132847 A CN 201711132847A CN 109788574 B CN109788574 B CN 109788574B
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- 238000000034 method Methods 0.000 title claims abstract description 306
- 230000004044 response Effects 0.000 claims abstract description 52
- 230000005540 biological transmission Effects 0.000 claims description 90
- 238000011144 upstream manufacturing Methods 0.000 claims description 39
- 230000011664 signaling Effects 0.000 claims description 33
- 239000004973 liquid crystal related substance Substances 0.000 claims description 22
- 238000004891 communication Methods 0.000 claims description 15
- 238000013475 authorization Methods 0.000 claims description 5
- 230000036963 noncompetitive effect Effects 0.000 claims description 2
- 238000004590 computer program Methods 0.000 claims 2
- 230000000977 initiatory effect Effects 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000003672 processing method Methods 0.000 description 22
- 238000010586 diagram Methods 0.000 description 18
- 238000012545 processing Methods 0.000 description 13
- 238000013461 design Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 10
- 230000003993 interaction Effects 0.000 description 10
- 230000003213 activating effect Effects 0.000 description 6
- 238000013507 mapping Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
- H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0866—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/02—Selection of wireless resources by user or terminal
Abstract
The application provides a random access method, user equipment and network equipment, wherein the user equipment side method comprises the following steps: the user equipment selects a random access preamble from a random access preamble set, and selects a random access channel resource from a random access channel resource set; the user equipment sends the random access preamble through the random access channel resource; the user equipment receives a random access response message on a first downlink bandwidth part; wherein at least one of the set of random access preambles or the set of random access channel resources corresponds to the first downlink bandwidth portion; the random access channel resources include at least one of time domain resources of a random access channel or frequency domain resources of a random access channel. According to the method, the network equipment only sends the random access response on the downlink bandwidth part corresponding to the random access configuration according to the corresponding relation, so that the waste of downlink resources is avoided.
Description
Technical Field
The present application relates to communications technologies, and in particular, to a random access method, a user equipment, and a network device.
Background
In a 5G communication system, when the bandwidth of a cell is large, the user equipment may operate only on a portion of the bandwidth of the cell. Each partial Bandwidth of the cell is referred to as a Bandwidth part (Bandwidth part). On a wideband carrier, the network device may configure one or more downstream bandwidth portions and one or more upstream bandwidth portions for a user device simultaneously. The random access procedure in the 5G communication system may also be performed based on the bandwidth part described above.
In the prior art, in the random access procedure based on the bandwidth part, the network device needs to send a random access response (Random Access Response, RAR) and a physical downlink control channel (Physical Downlink Control Channel, PDCCH) for scheduling Msg3 retransmission on all configured downlink bandwidth parts, so that the UE receives the RAR and the PDCCH for scheduling Msg3 retransmission.
However, the method of the prior art causes serious waste of downlink resources.
Disclosure of Invention
The application provides a random access method, user equipment and network equipment, which are used for solving the problem of downlink resource waste caused in the random access process in the prior art.
The first aspect of the present application provides a method for random access, the method comprising:
the user equipment selects a random access preamble from a random access preamble set, and selects a random access channel resource from a random access channel resource set;
the user equipment sends the random access preamble through the random access channel resource;
the user equipment receives a random access response message on a first downlink bandwidth part;
wherein at least one of the set of random access preambles or the set of random access channel resources corresponds to the first downlink bandwidth portion;
the random access channel resources include at least one of time domain resources of a random access channel or frequency domain resources of a random access channel.
In the method, the network equipment only sends the random access response on the downlink bandwidth part corresponding to the random access configuration according to the corresponding relation by establishing the corresponding relation between the downlink bandwidth part and the random access related configuration or establishing the corresponding relation between the downlink bandwidth part and the uplink bandwidth part, thereby avoiding the waste of downlink resources.
Further, the first downlink bandwidth part is an activated downlink bandwidth part when the user equipment performs the random access procedure.
Further, at least one of the set of random access preambles or the set of random access channel resources corresponds to the first downlink bandwidth portion, comprising:
at least one of the random access preamble set and the random access channel resource set corresponds to a first control resource set of the first downlink bandwidth part, wherein the first control resource set indicates the user equipment to receive or search a time-frequency domain resource set of a downlink control channel;
the downlink control channel is used for scheduling any downlink transmission and/or uplink transmission, or the downlink control channel is used for scheduling at least one of random access procedure message two transmission, random access procedure message triple transmission and random access procedure message four transmission, the random access procedure message two is a random access response message, the random access procedure message three is uplink transmission scheduled for the first time, and the random access procedure message four is a random access contention resolution message.
In one possible design, the method further comprises:
the user equipment receives a first message sent by network equipment, wherein the first message comprises configuration information indicating the corresponding relation between the first downlink bandwidth part and the first uplink bandwidth part and random access information of the first uplink bandwidth part; or the first message includes configuration information indicating the corresponding relation between the first downlink bandwidth part and random access information and a first uplink bandwidth part corresponding to the random access information;
Wherein, the liquid crystal display device comprises a liquid crystal display device,
the random access information includes at least one of the following information:
first configuration information for indicating random access of frequency domain resources of a random access channel;
second configuration information for indicating random access of time domain resources of the random access channel;
third configuration information for indicating random access of the set of random access preambles.
Further, the random access information only includes the first configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment;
the set of random access preambles is the same as a set of random access preambles configured on the second uplink bandwidth portion of the user equipment.
Further, the random access information only includes the second configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
The frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the first uplink bandwidth part, wherein N is a predefined positive integer;
the set of random access preambles is the same as a set of random access preambles configured on a second uplink bandwidth portion of the user equipment.
Further, the random access information of the first uplink bandwidth part only includes the third configuration information;
in response to this, the control unit,
the random access preamble set is a random access preamble set indicated by the third configuration information;
the frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the first uplink bandwidth part, wherein N is a predefined positive integer;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
Further, the random access information of the first uplink bandwidth part includes the first configuration information and the second configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the set of random access preambles is the same as a set of random access preambles configured on a second uplink bandwidth portion of the user equipment.
Further, the random access information of the first uplink bandwidth part includes first configuration information and third configuration information of the random access;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the random access preamble set is a random access preamble set indicated by the third configuration information of the random access;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
Further, the random access information of the first uplink bandwidth part includes the second configuration information and the third configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
The random access preamble set is a random access preamble set indicated by the third configuration information;
the frequency domain resources of the random access channel in the random access channel resource set are central N physical resource blocks of the first uplink bandwidth part, wherein N is a predefined positive integer.
Further, the random access information of the first uplink bandwidth part includes the first configuration information, the second configuration information and the third configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the random access preamble set is the random access preamble set indicated by the third configuration information.
Further, the second uplink bandwidth portion is:
an initial uplink bandwidth part of the user equipment on a serving cell;
or a first active uplink bandwidth portion of the user equipment on the serving cell;
Or a default uplink bandwidth part of the user equipment on the service cell;
or the network equipment configures or indicates the uplink bandwidth part for the user equipment through special signaling;
and the serving cell sends the random access preamble to the user equipment.
Further, the method further comprises:
the user equipment transmits the random access preamble through the random access channel resource on the first uplink bandwidth part.
Further, the method further comprises:
if the uplink bandwidth part activated by the ue during the random access procedure is a third uplink bandwidth part, then:
the user equipment activates the first uplink bandwidth part and deactivates the third uplink bandwidth part, or the user equipment switches from the third uplink bandwidth part to the first uplink bandwidth part; correspondingly, the ue sends the random access preamble through the random access channel resource, including:
the user equipment transmits the random access preamble through the random access channel resource on the first uplink bandwidth part.
Further, the method further comprises:
if the random access procedure is a contention-based random access procedure, then:
the user equipment sends a message III of the random access process on the first uplink bandwidth part;
and the user equipment receives physical downlink control channels for scheduling message triple transmission of the random access process and message four transmission of the random access process on the first downlink bandwidth part.
In one possible design, the first downlink bandwidth portion is a downlink bandwidth portion corresponding to a fourth uplink bandwidth portion of the ue;
the fourth uplink bandwidth part is an uplink bandwidth part in which the user equipment is configured with a random access preamble set and a random access channel resource set on a serving cell;
the random access preamble set is a random access preamble set configured on the fourth uplink bandwidth part;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel configured on the fourth uplink bandwidth part;
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel configured on the fourth uplink bandwidth part;
Accordingly, the ue sends the random access preamble through the random access channel resource, including:
the user equipment sends the random access preamble through the random access channel resource on the fourth uplink bandwidth part;
and the serving cell sends the random access preamble to the user equipment.
Further, the common configuration of the serving cell includes the configuration of the first downlink bandwidth portion and the configuration of the fourth uplink bandwidth portion;
the common configuration of the serving cells is included in the system information transmitted on the first downlink bandwidth part.
Further, the public configuration or the private configuration of the serving cell includes the configuration of the first downlink bandwidth part and the configuration of the fourth uplink bandwidth part;
the common configuration of the serving cell is sent by the network device to the user device by dedicated signaling.
Further, the method further comprises:
if the uplink bandwidth portion activated by the ue on the serving cell is a fifth uplink bandwidth portion, the ue activates the fourth uplink bandwidth portion and deactivates the fifth uplink bandwidth portion, or the ue switches from the fifth uplink bandwidth portion to the third uplink bandwidth portion, when any one of the following conditions occurs:
A time calibration timer TAT associated with the serving cell of the user equipment expires;
the number of times that the user equipment transmits the scheduling request reaches the maximum allowable transmission number;
the user equipment receives a signaling sent by the network equipment and indicating the user equipment to initiate the random access process;
when the user equipment performs the random access process;
the user equipment selects the random access preamble and the random access channel resource;
and when the user equipment transmits the random access preamble.
Further, the method further comprises:
when any one of the following conditions occurs, if the downlink bandwidth portion activated by the ue on the serving cell is a second downlink bandwidth portion, the ue activates the first downlink bandwidth portion and deactivates the second downlink bandwidth portion, or the ue switches from the second downlink bandwidth portion to the first downlink bandwidth portion:
the time calibration timer TAT of the user equipment is overtime;
the number of times of sending the scheduling request of the user equipment reaches the maximum allowable sending number;
the user equipment receives a signaling sent by the network equipment and indicating the user equipment to initiate a random access process;
When the user equipment performs the random access process;
when the user equipment receives the random access response message;
and when the user equipment transmits the random access preamble.
Further, the deactivating the second downstream bandwidth portion or the user equipment transitioning from the second downstream bandwidth portion to the first downstream bandwidth portion includes:
if a first timer configured by the user equipment on the serving cell is running, then:
the user equipment stops the first timer, or the user equipment stops and resets the first timer;
wherein the first timer is configured to: and if the first timer is overtime, the user equipment activates a default downlink bandwidth part on the service cell, or the user equipment converts the activated downlink bandwidth part to the default downlink bandwidth part on the service cell.
Further, the method further comprises:
the user equipment starts or restarts the first timer when the contention resolution of the random access process is successful;
or the user equipment starts or restarts the first timer when the random access response message is successfully received.
Further, the method further comprises:
if the random access is a contention-based random access, then:
the user equipment sends a message III of the random access process on the fourth uplink bandwidth part;
and the user equipment receives physical downlink control channels for scheduling message triple transmission of the random access process and message four transmission of the random access process on the first downlink bandwidth part.
In one possible design, the user equipment transmitting the random access preamble over the random access channel resource includes:
the user equipment transmits the random access preamble through the random access channel resource on a sixth uplink bandwidth part;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the random access preamble set is a random access preamble set configured on the sixth uplink bandwidth part;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel configured on the sixth uplink bandwidth part;
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel configured on the sixth uplink bandwidth part.
Further, the sixth upstream bandwidth portion is:
an initial uplink bandwidth part of the user equipment on a serving cell;
or a first active uplink bandwidth portion of the user equipment on the serving cell;
or a default uplink bandwidth part of the user equipment on the service cell;
the network equipment configures or indicates an uplink bandwidth part for the user equipment through special signaling;
and the serving cell sends the random access preamble to the user equipment.
Further, the method further comprises:
and if the random access process is a non-competitive random access process, the user equipment performs uplink transmission on the sixth uplink bandwidth part, wherein the physical resource used by the uplink transmission is a physical resource indicated by uplink authorization in the random access response.
In one possible design, the method further comprises:
the user equipment receives a second message sent by the network equipment, wherein the second message comprises configuration information indicating the corresponding relation between the first downlink bandwidth part and the seventh uplink bandwidth part.
Further, the frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the seventh uplink bandwidth part, where N is a predefined positive integer;
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the eighth uplink bandwidth part of the user equipment;
the set of random access preambles is the same as a set of random access preambles configured on the eighth uplink bandwidth portion of the user equipment.
Further, the eighth upstream bandwidth part is:
an initial uplink bandwidth part of the user equipment on a serving cell;
or a first active uplink bandwidth portion of the user equipment on the serving cell;
or a default uplink bandwidth part of the user equipment on the service cell;
or the network equipment configures or indicates the uplink bandwidth part for the user equipment through special signaling;
and the serving cell sends the random access preamble to the user equipment.
Further, the ue sends the random access preamble through the random access channel resource, including:
the user equipment sends the random access preamble through the random access channel resource on the seventh uplink bandwidth part;
Further, the method further comprises:
if the uplink bandwidth part activated by the ue during the random access procedure is a ninth uplink bandwidth part, then:
the user equipment activates the seventh upstream bandwidth part and deactivates the ninth upstream bandwidth part, or the user equipment switches from the ninth upstream bandwidth part to the seventh upstream bandwidth part
Correspondingly, the ue sends the random access preamble through the random access channel resource, including:
the user equipment transmits the random access preamble through the random access channel resource on the seventh uplink bandwidth part.
Further, the method further comprises:
if the random access procedure is a contention-based random access procedure, then:
the user equipment sends a message III of the random access process on the seventh uplink bandwidth part;
and the user equipment receives physical downlink control channels for scheduling message triple transmission of the random access process and message four transmission of the random access process on the first downlink bandwidth part.
In one possible design, the method further comprises:
The user equipment receives a third message sent by the network equipment, wherein the third message comprises random access information and configuration information indicating the corresponding relation between the first downlink bandwidth part and the random access information;
wherein the random access information includes at least one of the following information:
fourth configuration information for indicating random access of frequency domain resources of the random access channel;
fifth configuration information for indicating random access of time domain resources of the random access channel;
sixth configuration information for indicating random access of the random access preamble set.
Further, the random access information includes only the fourth configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the fourth configuration information;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel corresponding to the third downlink bandwidth part of the user equipment;
the random access preamble set is the same as a random access preamble set corresponding to the third downlink bandwidth portion of the user equipment.
Further, the random access information includes only the fifth configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the fifth configuration information;
the frequency domain resource of the random access channel in the random access channel resource set is the same as the frequency domain resource of the random access channel corresponding to the third downlink bandwidth part of the user equipment;
the random access preamble set is the same as a random access preamble set corresponding to the third downlink bandwidth portion of the user equipment.
Further, the random access information includes only the sixth configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel corresponding to the third downlink bandwidth part of the user equipment;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel corresponding to the third downlink bandwidth part of the user equipment;
the random access preamble set is a random access preamble set indicated by the sixth configuration information of the user equipment.
Further, the random access information includes the fourth configuration information and the fifth configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the fourth configuration information;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the fifth configuration information;
the random access preamble set is the same as a random access preamble set corresponding to the third downlink bandwidth portion of the user equipment.
Further, the random access information includes the fourth configuration information and the sixth configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the fourth configuration information;
the random access preamble set is a random access preamble set indicated by the sixth configuration information of the user equipment;
and the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel corresponding to the third downlink bandwidth part of the user equipment.
Further, the random access information includes the fifth configuration information and the sixth configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the fifth configuration information;
the random access preamble set is a random access preamble set indicated by the sixth configuration information of the user equipment;
the frequency domain resource of the random access channel in the random access channel resource set is the same as the frequency domain resource of the random access channel corresponding to the third downlink bandwidth part of the user equipment.
Further, the random access information includes the fourth configuration information, the fifth configuration information, and the sixth configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the fourth configuration information;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the fifth configuration information;
the random access preamble set is a random access preamble set indicated by the sixth configuration information of the user equipment.
Further, the third downlink bandwidth part is:
an initial downlink bandwidth portion of the user equipment on a serving cell;
or a first active downlink bandwidth part of the user equipment on the serving cell;
or a default downlink bandwidth part of the user equipment on the serving cell;
or the network equipment configures or indicates the uplink bandwidth part for the user equipment through special signaling;
and the serving cell sends the random access preamble to the user equipment.
Further, the method further comprises:
the user equipment sends the random access preamble through the random access information resource on a tenth uplink bandwidth part;
wherein the tenth uplink bandwidth part comprises frequency domain resources of the random access channel in the random access channel resource set.
Further, the method further comprises:
if the uplink bandwidth part activated by the ue during the random access procedure is an eleventh uplink bandwidth part, then:
the user equipment activates the tenth upstream bandwidth part and deactivates the eleventh upstream bandwidth part, or the user equipment switches from the eleventh upstream bandwidth part to the tenth upstream bandwidth part;
Correspondingly, the ue sends the random access preamble through the random access channel resource, including:
the user equipment transmits the random access preamble through the random access channel resource on the tenth uplink bandwidth part.
Further, the method further comprises:
if the random access procedure is a contention-based random access procedure, then:
the user equipment sends a message III of the random access process on the tenth uplink bandwidth part;
and the user equipment receives physical downlink control channels for scheduling message triple transmission of the random access process and message four transmission of the random access process on the first downlink bandwidth part.
In one possible design, the first downlink bandwidth portion is a downlink bandwidth portion corresponding to a twelfth uplink bandwidth portion of the ue;
the twelfth uplink bandwidth part is an uplink bandwidth part activated by the user equipment when the random access is performed;
correspondingly, the ue sends the random access preamble through the random access channel resource, including:
the user equipment transmits the random access preamble over the random access channel resource on the twelfth uplink bandwidth portion.
Further, the method further comprises:
the user equipment receives a fourth message sent by network equipment, wherein the fourth message comprises random access information of the twelfth uplink bandwidth part and configuration information indicating the corresponding relation between the twelfth bandwidth part and the first downlink bandwidth part, and the configuration information is used for configuring the twelfth uplink bandwidth part for the user equipment;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the random access information of the twelfth uplink bandwidth part includes at least one of the following information:
seventh configuration information for indicating random access of frequency domain resources of the random access channel;
eighth configuration information for indicating random access of time domain resources of the random access channel;
ninth configuration information for indicating random access of the random access preamble set.
Further, the random access information of the twelfth uplink bandwidth part only includes the seventh configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the seventh configuration information of the random access;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel of the thirteenth uplink bandwidth part of the user equipment;
The set of random access preambles is the same as the set of random access preambles of the thirteenth uplink bandwidth portion of the user equipment.
Further, the random access information of the twelfth uplink bandwidth part only includes the eighth configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the eighth configuration information of the random access;
the frequency domain resources of the random access channel in the random access channel resource set are the central N physical resource blocks of the twelfth uplink bandwidth part, wherein N is a predefined positive integer.
The set of random access preambles is the same as the set of random access preambles of the thirteenth uplink bandwidth portion of the user equipment.
Further, the random access information of the twelfth uplink bandwidth part only includes the ninth configuration information;
in a corresponding manner,
the random access preamble set is a random access preamble set indicated by ninth configuration information of the random access;
the frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the twelfth uplink bandwidth part, wherein N is a predefined positive integer;
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access of the thirteenth uplink bandwidth part of the user equipment.
Further, the random access information of the twelfth uplink bandwidth part includes the seventh configuration information and the eighth configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the seventh configuration information of the random access;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel indicated by the eighth configuration information of the random access;
the set of random access preambles is the same as the set of random access preambles of the thirteenth uplink bandwidth portion of the user equipment.
Further, the random access information of the twelfth uplink bandwidth part includes the seventh configuration information and ninth configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the seventh configuration information of the random access;
The random access preamble set is a random access preamble set indicated by ninth configuration information of the random access;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel of the thirteenth uplink bandwidth part of the user equipment.
Further, the random access configuration information of the twelfth uplink bandwidth part includes the eighth configuration information and ninth configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the eighth configuration information of the random access;
the random access preamble set is a random access preamble set indicated by ninth configuration information of the random access;
the frequency domain resources of the random access channel in the random access channel resource set are the central N physical resource blocks of the twelfth uplink bandwidth part, wherein N is a predefined positive integer.
Further, the random access configuration information of the twelfth uplink bandwidth part includes the seventh configuration information, eighth configuration information and ninth configuration information;
In a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the seventh configuration information of the random access;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the eighth configuration information of the random access;
the random access preamble set is a random access preamble set indicated by ninth configuration information of the random access.
Further, the thirteenth upstream bandwidth portion is:
an initial uplink bandwidth portion of the user equipment on the serving cell;
or a first active uplink bandwidth portion of the user equipment on the serving cell;
or a default uplink bandwidth part of the user equipment on the service cell;
or the network equipment configures or indicates the uplink bandwidth part for the user equipment through special signaling;
and the serving cell sends the random access preamble to the user equipment.
Further, the method further comprises:
if the downlink bandwidth part activated by the user equipment when the random access is performed is a fourth downlink bandwidth part, then:
The user equipment activates the first downlink bandwidth part and deactivates the fourth downlink bandwidth part, or the user equipment switches from the fourth downlink bandwidth part to the first downlink bandwidth part;
further, the method further comprises:
if the random access procedure is a contention-based random access procedure, then:
the user equipment sends a message III of the random access process on the twelfth uplink bandwidth part;
and the user equipment receives physical downlink control channels for scheduling message triple transmission of the random access process and message four transmission of the random access process on the first downlink bandwidth part.
Further, the method further comprises:
the service cell is a main service cell of the terminal equipment or a secondary service cell of the terminal equipment;
the primary serving cell comprises a primary serving cell in a primary cell group and a primary serving cell in a secondary cell group of the terminal device.
The second aspect of the present application provides a random access method, which includes:
the method comprises the steps that network equipment receives a random access preamble sent by user equipment through random access channel resources, wherein the random access preamble is selected from a random access preamble set by the user equipment, and the random access channel resources are selected from a random access channel resource set by the user equipment;
The network device sending a random access response to the user device on a first downlink bandwidth portion;
wherein at least one of the set of random access preambles or the set of random access channel resources corresponds to the first downlink bandwidth portion;
the random access channel resources include at least one of time domain resources of a random access channel or frequency domain resources of a random access channel.
Further, the first downlink bandwidth part is an activated downlink bandwidth part when the user equipment performs the random access procedure.
Further, at least one of the set of random access preambles or the set of random access channel resources corresponds to the first downlink bandwidth portion, comprising:
at least one of the random access preamble set and the random access channel resource set corresponds to a first control resource set of the first downlink bandwidth part, wherein the first control resource set indicates the user equipment to receive or search a time-frequency domain resource set of a downlink control channel;
the downlink control channel is used for scheduling any downlink transmission and/or uplink transmission, or the downlink control channel is used for scheduling at least one of random access procedure message two transmission, random access procedure message triple transmission and random access procedure message four transmission, the random access procedure message two is a random access response message, the random access procedure message three is uplink transmission scheduled for the first time, and the random access procedure message four is a random access contention resolution message.
In one possible design, the method further comprises:
the network device sends a first message to the user device, wherein the first message comprises configuration information indicating the corresponding relation between the first downlink bandwidth part and the first uplink bandwidth part and random access information of the first uplink bandwidth part; or the first message includes configuration information indicating the corresponding relation between the first downlink bandwidth part and random access information and a first uplink bandwidth part corresponding to the random access information;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the random access information includes at least one of the following information:
first configuration information for indicating random access of frequency domain resources of a random access channel;
second configuration information for indicating random access of time domain resources of the random access channel;
third configuration information for indicating random access of the set of random access preambles.
Further, the random access information only includes the first configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment;
the set of random access preambles is the same as a set of random access preambles configured on the second uplink bandwidth portion of the user equipment.
Further, the random access information only includes the second configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the first uplink bandwidth part, wherein N is a predefined positive integer;
the set of random access preambles is the same as a set of random access preambles configured on a second uplink bandwidth portion of the user equipment.
Further, the random access information of the first uplink bandwidth part only includes the third configuration information;
in response to this, the control unit,
the random access preamble set is a random access preamble set indicated by the third configuration information;
The frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the first uplink bandwidth part, wherein N is a predefined positive integer;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
Further, the random access information of the first uplink bandwidth part includes the first configuration information and the second configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the set of random access preambles is the same as a set of random access preambles configured on a second uplink bandwidth portion of the user equipment.
Further, the random access information of the first uplink bandwidth part includes first configuration information and third configuration information of the random access;
In a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the random access preamble set is a random access preamble set indicated by the third configuration information of the random access;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
Further, the random access information of the first uplink bandwidth part includes the second configuration information and the third configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the random access preamble set is a random access preamble set indicated by the third configuration information;
the frequency domain resources of the random access channel in the random access channel resource set are central N physical resource blocks of the first uplink bandwidth part, wherein N is a predefined positive integer.
Further, the random access information of the first uplink bandwidth part includes the first configuration information, the second configuration information and the third configuration information;
In a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the random access preamble set is the random access preamble set indicated by the third configuration information.
Further, the second uplink bandwidth portion is:
an initial uplink bandwidth part of the user equipment on a serving cell;
or a first active uplink bandwidth portion of the user equipment on the serving cell;
or a default uplink bandwidth part of the user equipment on the service cell;
or the network equipment configures or indicates the uplink bandwidth part for the user equipment through special signaling;
and the serving cell sends the random access preamble to the user equipment.
Further, the method further comprises:
the network device receives the random access preamble transmitted by the user device over the random access channel resource on the first uplink bandwidth portion.
In one possible design, the first downlink bandwidth portion is a downlink bandwidth portion corresponding to a fourth uplink bandwidth portion of the ue;
the fourth uplink bandwidth part is an uplink bandwidth part in which the user equipment is configured with a random access preamble set and a random access channel resource set on a serving cell;
the random access preamble set is a random access preamble set configured on the fourth uplink bandwidth part;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel configured on the fourth uplink bandwidth part;
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel configured on the fourth uplink bandwidth part;
accordingly, the network device receives a random access preamble sent by the user device through the random access channel resource, including:
the network device receives the random access preamble sent by the user device on the fourth uplink bandwidth portion through the random access channel resource.
In one possible design, the network device receives a random access preamble transmitted by a user device over a random access channel resource, comprising:
The network device receives the random access preamble sent by the user device on a sixth uplink bandwidth part through the random access channel resource;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the random access preamble set is a random access preamble set configured on the sixth uplink bandwidth part;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel configured on the sixth uplink bandwidth part;
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel configured on the sixth uplink bandwidth part.
A third aspect of the present application provides a user equipment having functionality to implement the user equipment of the first aspect. These functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.
In one possible design, the ue may include a receiving module, a processing module, and a transmitting module, where the modules may perform the corresponding functions in the above methods, for example: a processing module for selecting a random access preamble from a set of random access preambles and selecting a random access channel resource from a set of random access channel resources; a sending module, configured to send the random access preamble through the random access channel resource; and a receiving module for receiving the random access response message on the first downlink bandwidth part.
A fourth aspect of the present application provides a network device having functionality to implement the network device of the second aspect. These functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.
In one possible design, the network device may include a receiving module, a processing module, and a transmitting module, where the modules may perform the corresponding functions of the methods described above, for example: a receiving module, configured to receive a random access preamble sent by a user equipment through a random access channel resource, where the random access preamble is selected by the user equipment from a random access preamble set, and the random access channel resource is selected by the user equipment from a random access channel resource set; the processing module sends a random access response to the user equipment on the first downlink bandwidth portion through the sending module.
A fifth aspect of the application provides a user equipment comprising a processor and a memory, the memory for storing instructions, the processor for executing the instructions in the memory, performing the method of the first aspect.
A sixth aspect of the application provides a network device comprising a processor and a memory, the memory for storing instructions, the processor for executing the instructions in the memory, performing the method of the second aspect.
A seventh aspect of the present application provides a chip, the chip being usable with a user equipment, the chip comprising: at least one communication interface, at least one processor, at least one memory, wherein the communication interface, the processor and the memory are interconnected by a circuit (in some cases also a bus), the processor invoking instructions stored in the memory to perform the method of the first aspect described above.
An eighth aspect of the present application provides a chip that can be used in a network device, the chip comprising: at least one communication interface, at least one processor, at least one memory, wherein the communication interface, the processor and the memory are interconnected by a circuit (in some cases also a bus), the processor invoking instructions stored in the memory to perform the method of the second aspect described above.
A ninth aspect of the application provides a computer readable medium having stored therein one or more program code which, when executed by a user equipment, performs the relevant method steps performed by the user equipment of the first aspect.
A tenth aspect of the present application provides a computer readable medium having stored therein one or more program code which, when executed by a network device, performs the relevant method steps performed by the network device in the second aspect.
Drawings
Fig. 1 and 2 are schematic views of a scene according to the present application;
FIG. 3 is a schematic diagram of a bandwidth portion;
fig. 4 is a schematic diagram of a contention-based random access procedure;
fig. 5 is a schematic diagram of a random access procedure based on non-contention;
fig. 6 is an interaction flow chart of a first embodiment of a random access processing method provided by the present application;
fig. 7 is an interaction flow chart of a second embodiment of a random access processing method provided by the present application;
fig. 8 is an interaction flow chart of a third embodiment of a random access processing method provided by the present application;
fig. 9 is an interaction flow chart of a random access processing method according to a fourth embodiment of the present application;
fig. 10 is an interaction flow chart of a fifth embodiment of a random access processing method provided by the present application;
fig. 11 is an interaction flow chart of a sixth embodiment of a random access processing method provided by the present application;
fig. 12 is a block diagram of a first embodiment of a ue according to the present application;
Fig. 13 is a block diagram of a first embodiment of a network device according to the present application;
fig. 14 is a physical block diagram of a user equipment according to the present application;
fig. 15 is a physical block diagram of a network device according to the present application;
FIG. 16 is a physical block diagram of a chip according to the present application;
fig. 17 is a physical block diagram of a chip provided by the present application.
Detailed Description
Fig. 1 and 2 are schematic views of a scenario according to the present application, and as shown in fig. 1 and 2, it is assumed that UE1 is an idle state UE, and UE2 and UE3 are connected state UEs. The downlink bandwidth parts activated by the UE1, the UE2 and the UE3 are respectively a downlink bandwidth part 1, a downlink bandwidth part 2 and a downlink bandwidth part 3. While the currently configured random access channels PRACH for UE1, UE2 and UE3 are the same as the set of random access preambles that may be selected for contention-based random access.
For contention-based random access, it is unclear from the network device after receiving a random access preamble until successful reception of Msg3, which UE transmits the random access preamble, and thus which downlink BWP the UE currently activates a downlink wideband Part (BWP) in order for the UE to be able to receive RAR and possibly PDCCH scheduling Msg3 retransmissions, the network device needs to transmit RAR and PDCCH scheduling Msg3 retransmissions on all configured DL Bandwidth parts.
Since the network device transmits RAR and PDCCH scheduling Msg 3 retransmission on all configured DL bandwidth portions, a great waste of downlink resources is caused.
The technical scheme provided by the application aims to solve the problems.
In order to facilitate understanding of the present application to those skilled in the art, the following first describes concepts to which the present application relates.
1. Bandwidth part
When the bandwidth of a cell is large, the user equipment may operate only on a portion of the bandwidth of the cell. Each partial bandwidth of the cell is referred to as a bandwidth portion. Fig. 3 is a schematic diagram of a bandwidth portion. On a broadband carrier, the network device may configure one or more downstream bandwidth portions and one or more upstream bandwidth portions for a user device simultaneously. Each downstream bandwidth portion and each upstream bandwidth portion allocated to the user equipment has an ID of the bandwidth portion. The corresponding configuration information of each BWP at least includes:
(1) The BWP supports Numerology of a physical layer, including subcarrier spacing configuration and cyclic prefix length. The Numerology supported by different BWP may be the same or different.
(2) The bandwidth of the BWP;
(3) The BWP frequency location.
2. Random access
The random access procedure includes two types: contention-based random access and non-contention random access.
Fig. 4 is a schematic diagram of a contention-based random access procedure, and as shown in fig. 4, the contention-based random access procedure specifically includes the following steps:
msg 1, UE transmits a random access preamble on a random access channel (Physical Random Access Channel, PRACH) of the serving cell.
The PRACH resource set is configured by the network equipment through system information; the UE randomly selects one PRACH resource from the PRACH resource set to send a random access preamble. The PRACH resources include time domain resources of PRACH and frequency domain resources of PRACH.
The set of random access preambles available for contention-based random access is configured by the network device to the UE through system information. The UE randomly selects one from the available random access preambles to transmit.
The Msg 2 and the network equipment schedule RAR to the UE through the PDCCH scrambled by the RA-RNTI. The UE receives the network device scheduled RAR message on the serving cell that sent the random access preamble.
The network device cannot identify which UE the UE transmitting the random access preamble is based only on the received random access preamble.
After the MSG3 and the UE successfully receive the random access response message, the MSG3 is sent by utilizing the resource position indicated by the uplink authorization in the RAR.
MSG4: if the network device is able to successfully decode the Msg 3 sent by the UE, a contention resolution message is replied. And when the UE receives the contention resolution message, the random access process is considered to be successful. Otherwise, if the UE has not received the contention resolution message when the timer for contention resolution expires, the UE considers that the current random access fails and needs to retransmit the random access.
If the network device fails to decode Msg 3, the network device may schedule the UE to retransmit Msg 3.
Only after the network device successfully receives Msg 3, the network device can determine which UE is performing random access according to the ID information of the UE included in Msg 3.
Fig. 5 is a schematic diagram of a random access procedure based on non-contention, and as shown in fig. 5, the random access procedure based on non-contention specifically includes the following steps:
msg 0: the network device sends a message to trigger the UE to initiate random access. There are two types of messages for different trigger reasons or events of random access: for the case that the UE has downlink data arrival but the UE is not uplink synchronized, or for establishing uplink synchronization of the UE on the SCell, the network device triggers the UE to initiate random access through PDCCH indication. In the PDCCH indication, configuration information of a random access preamble to be transmitted by the UE and PRACH (physical random access channel, physical Random Access Channle) transmitting the random access preamble is included;
-the network device sending a radio resource control (Radio Resource Control, RRC) connection reconfiguration message with the mobile control information to the UE for the case that the UE needs to be handed over. The UE initiates a random access procedure upon receipt of the message. In this case, the mobile control information includes a random access preamble to be transmitted by the UE and configuration information of PRACH for transmitting the random access preamble.
Msg 1: the UE transmits the random access preamble allocated in Msg 0 on the PRACH indicated in Msg 0.
Msg 2: the network device schedules RAR to the UE through the PDCCH scrambled by the RA-RNTI.
The UE acquires uplink synchronization after successfully receiving the random access response message to itself. And then, uplink data transmission is carried out to the network equipment by utilizing the uplink authorization in the RAR.
The application establishes the corresponding relation between the downlink bandwidth part and the random access related configuration, or establishes the corresponding relation between the uplink bandwidth part and the random access configuration, or establishes the corresponding relation between the downlink bandwidth part and the uplink bandwidth part, so that the network equipment only sends RAR and PDCCH for scheduling Msg 3 retransmission on the downlink bandwidth part corresponding to the random access configuration according to the corresponding relation.
The following embodiments of the present application are used to describe alternative embodiments of the above correspondence, respectively.
The term "correspondence" in the following embodiments of the present application is used to represent a mapping relationship, and therefore "correspondence" in the following embodiments of the present application may be replaced with terms representing a mapping relationship, such as "association", "mapping", "including", etc., and accordingly "correspondence" may be replaced with terms representing a mapping relationship, such as "association", "mapping relationship", "including", etc.
The following describes alternative embodiments describing the above correspondence, respectively.
Fig. 6 is an interactive flowchart of a first embodiment of a random access processing method provided by the present application, and as shown in fig. 6, the random access process includes:
s601, the network equipment sends a first message to the UE.
The first message is a random access message including configuration information indicating a correspondence between the first downlink bandwidth portion and the first uplink bandwidth portion, and the first uplink bandwidth portion.
The specific implementation manner of the configuration information in the first message comprises the following steps:
implementation 1-1: the configuration cell of the downlink bandwidth part includes the identifier BWP ID and the random access information of the uplink bandwidth part corresponding to the downlink bandwidth part. Optionally, the uplink bandwidth portion is an uplink bandwidth portion configured by the network device for the UE before the first message is sent.
Implementation 1-2: the configuration cell of the downlink bandwidth part includes the configuration cell of the uplink bandwidth part corresponding to the downlink bandwidth part. The configuration cell of the uplink bandwidth part contains the BWP identification of the uplink bandwidth part and the random access information corresponding to the uplink bandwidth part. Optionally, the uplink bandwidth portion is an uplink bandwidth portion configured by the network device for the UE before the first message is sent.
Implementation modes 1 to 3: the configuration information of the uplink bandwidth part corresponding to the downlink bandwidth part and the random access information are contained in the configuration information element of the downlink bandwidth part. Optionally, the uplink bandwidth portion is an uplink bandwidth portion configured by the network device for the UE in the first message.
Implementation modes 1 to 4: the configuration cell of the downlink bandwidth part includes the configuration cell of the uplink bandwidth part corresponding to the downlink bandwidth part. The configuration information of the uplink bandwidth part and the random access information corresponding to the uplink bandwidth part are contained in the configuration information of the uplink bandwidth part. Optionally, the uplink bandwidth portion is an uplink bandwidth portion configured by the network device for the UE in the first message.
Implementation modes 1 to 5: in the first message, the configuration information of the downlink bandwidth part and the configuration information of the uplink bandwidth part corresponding to the downlink bandwidth part are contained in the same BWP configuration cell. The random access information of the uplink bandwidth part is contained in a random access configuration cell containing the BWP ID of the uplink bandwidth part.
Or, the first message includes configuration information indicating a correspondence between the first downlink bandwidth portion and random access information and a first uplink bandwidth portion corresponding to the random access information. The first message may specifically be a radio resource reconfiguration message. .
The specific implementation manner of the configuration information in the first message comprises the following steps:
implementation 2-1: as in embodiment mode 1-1.
Embodiment 2-2: the configuration cell of the downlink bandwidth part comprises the configuration cell of the random access information corresponding to the downlink bandwidth part. The configuration cell of the random access configuration information contains the BWP identification of the uplink bandwidth part. Optionally, the uplink bandwidth portion is an uplink bandwidth portion configured by the network device for the UE before the first message is sent.
Embodiments 2 to 3: as in embodiments 1-3.
Embodiments 2 to 4: the configuration cell of the downlink bandwidth part comprises the configuration cell of the random access information corresponding to the downlink bandwidth part. The configuration information of the uplink bandwidth part is contained in the configuration information element of the random access information. Optionally, the uplink bandwidth portion is an uplink bandwidth portion configured by the network device for the UE in the first message.
Implementation 2-5: as in embodiments 1-5.
Wherein, the configuration information of the uplink bandwidth part includes at least one of the following information:
(1) The frequency domain position of the uplink bandwidth part.
(2) The bandwidth of the uplink bandwidth part.
(3) The bandwidth part of the upstream bandwidth part identifies the BWP ID.
Wherein, the configuration information of the downlink bandwidth part includes at least one of the following information:
(1) The frequency domain position of the downlink bandwidth part.
(2) The bandwidth of the downlink bandwidth part.
(3) The bandwidth part of the downstream bandwidth part identifies the BWP ID.
Wherein the random access information includes at least one of the following information:
(1) First configuration information for indicating random access of frequency domain resources of a random access channel. Specifically, according to the first configuration information, the position of the frequency domain resource of the random access channel, that is, the number and the position of the physical resource blocks occupied by the random access channel on the frequency domain, may be determined.
(2) Second configuration information for indicating random access of time domain resources of the random access channel. Specifically, according to the second configuration information, the location of the time domain resource of the random access channel, that is, the Frame number (Frame number) and the occupied Symbol (Symbol) of the random access channel in the time domain, or the mini-Slot (mini-Slot), or the Slot (Slot), or the number and the number of subframes (subframes) may be determined.
(3) Third configuration information for indicating random access of the set of random access preambles. And in particular, the available random access preamble ID can be determined according to the third configuration information.
The first configuration information, the second configuration information and the third configuration information may be configuration information of frequency domain resources of a specific random access channel, configuration information of time domain resources of a random access channel, configuration information of a random access channel preamble, or a random access configuration identifier ID, respectively. The random access configuration identifier ID corresponds to the frequency domain resource of the random access channel, and the time domain resource of the random access channel and the random access channel preamble are pre-configured or pre-defined by the network equipment. Therefore, according to the ID, the UE can determine the frequency domain resource of the random access channel, the time domain resource of the random access channel and the random access channel preamble, respectively.
S602, the user equipment selects a random access preamble from the random access preamble set, and selects a random access channel resource from the random access channel resource set.
Specifically, at least one of the set of random access preambles or the set of random access channel resources corresponds to the first downlink bandwidth portion. That is, at least one of the random access preamble set or the random access channel resource set has a correspondence with the first downlink bandwidth part. The correspondence here can be understood in particular as: when the UE performs random access, if the UE needs to receive the RAR on the first downlink BWP, the UE can select only the random access preamble transmitted from the set of random access preambles, or can select only the random access channel resources from the set of random access channel resources, or can select only the random access preamble transmitted from the set of random access preambles, and can select only the random access channel resources from the set of random access channel resources.
The set of random access channel resources includes at least one of time domain resources of a random access channel or frequency domain resources of a random access channel.
The first downlink bandwidth part is an activated downlink bandwidth part when the user equipment performs a random access process. For the random access procedure described above, there may be several explanations as follows:
explanation 1: and when the UE initiates the random access process. Comprising 1) when a medium access control (Media Access Control, MAC) entity of the UE triggers a random access procedure; 2) When RRC of UE triggers random access procedure; 3) When the UE receives a PDCCH indication sent by the network equipment and triggers a random access process; 3) And when the UE receives the RRC signaling sent by the network equipment and triggers the random access process.
Interpretation 2: the UE starts to perform a random access procedure.
Interpretation 3: the UE starts to open a window for listening to the random access response message.
The method for determining the set of random access channel resources and the set of random access preambles when the random access information of the first uplink bandwidth portion is different is described below.
1. The random access configuration information of the first uplink bandwidth part only includes the first configuration information.
In this case the number of the elements to be formed is,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information.
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
The random access preamble set is the same as the random access preamble set configured on the second uplink bandwidth portion of the user equipment.
2. The random access configuration information of the first uplink bandwidth part only includes the second configuration information.
In this case the number of the elements to be formed is,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information.
The frequency domain resources of the random access channel in the random access channel resource set are the central N physical resource blocks of the first uplink bandwidth part, where N is a predefined positive integer.
The random access preamble set is the same as the random access preamble set configured on the second uplink bandwidth portion of the user equipment.
3. The random access configuration information of the first uplink bandwidth part only includes the third configuration information.
In this case the number of the elements to be formed is,
the random access preamble set is a random access preamble set indicated by the third configuration information.
The frequency domain resources of the random access channel in the random access channel resource set are the central N physical resource blocks of the first uplink bandwidth part, where N is a predefined positive integer.
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
4. The random access configuration information of the first uplink bandwidth part includes the first configuration information and the second configuration information.
In this case the number of the elements to be formed is,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information.
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information.
The random access preamble set is a random access preamble set of a second uplink bandwidth portion of the user equipment.
5. The random access configuration information of the first uplink bandwidth part includes the first configuration information and third configuration information.
In this case the number of the elements to be formed is,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information.
The random access preamble set is a random access preamble set indicated by the third configuration information of the random access.
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
6. The random access configuration information of the first uplink bandwidth part comprises the second configuration information and third configuration information;
in this case the number of the elements to be formed is,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information.
The random access preamble set is a random access preamble set indicated by the third configuration information.
The frequency domain resources of the random access channel in the random access channel resource set are the central N physical resource blocks of the first uplink bandwidth part, where N is a predefined positive integer.
7. The random access configuration information of the first uplink bandwidth part comprises the first configuration information, the second configuration information and the third configuration information;
in this case the number of the elements to be formed is,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information.
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information.
The random access preamble set is a random access preamble set indicated by the third configuration information.
Optionally, for the "second upstream bandwidth portion" referred to in the above cases, it may specifically be the following upstream bandwidth portion:
an Initial uplink bandwidth portion (Initial UL BWP) of the user equipment on the serving cell. The Initial UL BWP may be 1) an Initial UL BWP in which the UE is in an idle state, or 2) an Initial UL BWP in which the network device configures the UE in a connected state. For 1), the Initial UL BWP is an uplink bandwidth portion configured by the UE in system information indicated or associated by a synchronization signal block (Cell defining SS Block) defining a cell on the serving cell. For 2), the Initial UL BWP is an uplink bandwidth portion configured by the network device in a common configuration element of the serving cell of the UE; the initial uplink bandwidth portion may also be referred to as an uplink bandwidth portion defining a cell.
Or, a first active uplink bandwidth portion (First Active UL BWP) of the user equipment on the serving cell. When the serving cell of First Active UL BWP UE is activated, the first uplink bandwidth part of the serving cell activated simultaneously is configured in a special configuration cell of the serving cell by a network device;
or, the Default uplink bandwidth part (Default UL BWP) of the user equipment on the serving cell. The Default UL BWP is an activated uplink bandwidth part to which the UE rolls back after no uplink data transmission for a period of time, and is configured in a cell-specific configuration cell of the serving cell by the network device;
alternatively, the network device configures or indicates for the user equipment one of the uplink bandwidth parts of the random access preamble that can be transmitted by configuring or indicating in a dedicated configuration cell of the serving cell.
Wherein, the serving cell is a serving cell for transmitting the random access preamble by the UE.
And the user equipment root determines the random access channel resource set and the random access preamble set according to the mode in the case when the condition is met according to the specific configuration information in the first message, and respectively selects the random access preamble and the random access channel resource from the random access channel resource set and the random access preamble set.
S603, the user equipment sends the random access preamble on the first uplink bandwidth.
If the uplink bandwidth part activated by the ue during the random access procedure is a third uplink bandwidth part, that is, the activated uplink bandwidth part is not the uplink bandwidth part corresponding to the first downlink bandwidth part, then the ue activates the first uplink bandwidth part and deactivates the third uplink bandwidth part, or the ue switches from the third uplink bandwidth part to the first uplink bandwidth part;
correspondingly, the user equipment sends the random access preamble through the random access channel resource, comprising:
and the user equipment transmits the random access preamble through the random access channel resource on the first uplink bandwidth part.
S604, the network device sends a random access response message on the first downlink bandwidth part of the user equipment.
The following steps S605-S606 are optional steps, which are performed when the random access is a contention-based random access.
S605, the user equipment sends a message III of the random access process on the first uplink bandwidth part.
S606, the network equipment receives a physical downlink control channel for scheduling message triple transmission of the random access process and message four transmission of the random access process on the first downlink bandwidth part.
As an optional implementation manner, if the UE receives, during the random access, the control signaling instructing the UE to perform downlink BWP conversion on the first downlink bandwidth portion, that is, deactivates the first downlink bandwidth portion and activates a new downlink bandwidth portion, the UE needs to determine an uplink bandwidth portion corresponding to the new downlink bandwidth portion. If the uplink bandwidth part corresponding to the new DL is the same as the uplink bandwidth part corresponding to the first downlink bandwidth part, or the random access information of the uplink bandwidth part corresponding to the new DL is the same as the random access information corresponding to the first downlink bandwidth part, the UE continues the current random access process; otherwise, the UE re-initiates the random access procedure and keeps the values of the variables and the values of the timer in the random access procedure unchanged.
In this embodiment, the network device sends the first message to the user device in advance to configure the random access information corresponding to the first downlink bandwidth portion, determines the random access preamble and the random access channel according to the random access information, and receives the RAR on the first downlink bandwidth portion, that is, the user device and the network device send the message on the corresponding random access channel according to the preset configuration, so that the network device is prevented from sending the RAR and the like on all the matched downlink bandwidth portions, and downlink resources are greatly saved.
Fig. 7 is an interaction flow chart of a second embodiment of a random access processing method provided by the present application, as shown in fig. 7, the random access process includes:
s701, the user equipment selects a random access preamble from the random access preamble set, and selects a random access channel resource from the random access channel resource set.
Specifically, the set of random access preambles and the set of random access channel resources correspond to a first downlink bandwidth portion. That is, the random access preamble set and the random access channel resource set have a correspondence relationship with the first downlink bandwidth portion. The correspondence here can be understood in particular as: when the UE performs random access, the UE needs to select a random access channel resource in a random access channel resource set of one of its configured uplink bandwidth parts, and select a random access preamble from a random access preamble set of the one uplink bandwidth part, and at the same time, the UE needs to receive an RAR message on the first downlink bandwidth part. Therefore, the set of random access channel resources and the set of random access preambles of the uplink bandwidth portion have a correspondence with the first downlink bandwidth portion.
Wherein the random access preamble set is the random access preamble set of the fourth uplink bandwidth portion.
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel of the fourth uplink bandwidth part.
The frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel of the fourth uplink bandwidth part.
The fourth uplink bandwidth part is an uplink bandwidth part in which the ue is configured with a random access channel in the serving cell. In particular. The fourth upstream bandwidth portion may be the following upstream bandwidth portion:
an Initial uplink bandwidth portion (Initial UL BWP) of the user equipment on the serving cell. The Initial UL BWP may be 1) an Initial UL BWP in which the UE is in an idle state, or 2) an Initial UL BWP in which the network device configures the UE in a connected state. For 1), the Initial UL BWP is a ULBWP configured by the UE in system information indicated or associated with a synchronization signal block Cell defining SS Block of a defined cell on the serving cell. For 2), the Initial UL BWP is an uplink bandwidth portion configured by the network device in a common configuration element of the serving cell of the UE; the initial uplink bandwidth portion may also be referred to as an uplink bandwidth portion defining a cell.
Or, a first active uplink bandwidth portion (First Active UL BWP) of the user equipment on the serving cell. The first uplink bandwidth part of the serving cell of First Active UL BWP UE is configured in the dedicated configuration cell of the serving cell by the network device when the serving cell is activated
Or, the Default uplink bandwidth part (Default UL BWP) of the user equipment on the serving cell. The Default UL BWP is an activated uplink bandwidth part to which the UE rolls back after no uplink data transmission for a period of time, and is configured in a cell-specific configuration cell of the serving cell by the network device;
alternatively, the network device configures or indicates for the user equipment one of the uplink bandwidth parts of the random access preamble that can be transmitted by configuring or indicating in a dedicated configuration cell of the serving cell.
Wherein, the serving cell is a serving cell for transmitting the random access preamble by the UE.
S702, the user equipment sends the random access preamble on the fourth uplink bandwidth part.
S703, the user equipment receives the random access response message on the first downlink bandwidth part.
That is, the network device transmits a random access response message on the first downlink bandwidth segment.
The first downlink bandwidth part is a downlink bandwidth part corresponding to a fourth uplink bandwidth part of the user equipment. That is, the first downstream bandwidth portion and the fourth upstream bandwidth portion have a correspondence relationship.
Alternatively, the correspondence between the first downstream bandwidth portion and the fourth upstream bandwidth portion may be configured in different manners.
In an alternative embodiment, the first downlink bandwidth part and the fourth uplink bandwidth part are configured by a common configuration of the serving cell, i.e. the downlink bandwidth part and the uplink bandwidth part configured in the common configuration of the serving cell have the above-mentioned correspondence.
In a further alternative embodiment, the common configuration of the serving cells is included in the system information transmitted on the first downlink bandwidth part.
In a further alternative embodiment, the common configuration of the serving cells is contained in dedicated signaling sent by the network device to the UE.
In another alternative embodiment, the correspondence between the first downstream bandwidth portion and the fourth upstream bandwidth portion is configured by a dedicated configuration of the serving cell.
Specifically, in the cell-specific configuration of the serving cell described above, the network device indicates the downstream bandwidth portion and the upstream bandwidth portion having the correspondence described above. For example, the first activated downlink bandwidth part and the first activated uplink bandwidth part are the downlink bandwidth part and the uplink bandwidth part with the corresponding relationship; or the default downlink bandwidth part and the default uplink bandwidth part are the downlink bandwidth part and the uplink bandwidth part with the corresponding relation.
The following steps S304-S305 are optional steps, which are performed when the random access is a contention based random access.
And S704, the user equipment sends a message III of the random access process on the fourth uplink bandwidth part.
And S705, the network equipment receives physical downlink control channels for scheduling message triple transmission of the random access process and message four transmission of the random access process on the first downlink bandwidth part.
As an optional implementation manner, when the ue meets any one of the following conditions, if the uplink bandwidth portion activated by the ue on the serving cell is the fifth uplink bandwidth portion, the ue activates the fourth uplink bandwidth portion and deactivates the fifth uplink bandwidth portion, or the ue switches from the fifth uplink bandwidth portion to the fourth uplink bandwidth portion;
(1) The time calibration timer TAT associated with the serving cell of the user equipment expires.
(2) The number of times the user equipment transmits the scheduling request reaches the maximum allowable transmission number.
(3) And the user equipment receives signaling sent by the network equipment and indicating the user equipment to initiate the random access process.
(4) When the user equipment performs the random access process;
(5) The user equipment selects the random access preamble and the random access channel resource;
(6) And when the user equipment transmits the random access preamble.
As another alternative embodiment, when the ue needs to initiate the random access procedure, if the uplink bandwidth portion activated by the ue on the serving cell is the fifth uplink bandwidth portion, the ue activates the fourth uplink bandwidth portion and deactivates the fifth uplink bandwidth portion, or the ue switches from the fifth uplink bandwidth portion to the fourth uplink bandwidth portion. After completing activating the fourth bandwidth part, the user equipment starts a random access preamble and random access channel resource selection process or starts a random access process.
As another optional implementation manner, when the ue satisfies any one of the following conditions, if the downlink bandwidth portion activated by the ue on the serving cell is the second downlink bandwidth portion, that is, the activated downlink bandwidth portion is not the first downlink bandwidth portion corresponding to the fourth uplink bandwidth portion, the ue activates the first downlink bandwidth portion and deactivates the second downlink bandwidth portion, or the ue switches from the second downlink bandwidth portion to the first downlink bandwidth portion:
(1) The time calibration timer TAT associated with the serving cell of the user equipment expires.
(2) The number of times the user equipment transmits the scheduling request reaches the maximum allowable transmission number.
(3) And the user equipment receives signaling sent by the network equipment and indicating the user equipment to initiate the random access process.
(4) When the user equipment performs the random access process;
(5) When the user equipment receives the random access response message;
(6) And when the user equipment transmits the random access preamble.
As another optional implementation manner, when the ue performs the random access procedure, if the downlink bandwidth portion activated by the ue on the serving cell is the second downlink bandwidth portion, that is, the activated downlink bandwidth portion is not the downlink bandwidth portion corresponding to the fourth uplink bandwidth portion, the ue needs to complete activating the first downlink bandwidth portion and deactivating the second downlink bandwidth portion, or complete switching from the second downlink bandwidth portion to the first downlink bandwidth portion, before starting to receive the random access response message. The period before starting to receive the random access response may specifically be before starting the receiving window of the random access response.
Optionally, the deactivating the second downlink bandwidth portion may specifically be:
if a first timer configured by the user equipment on the serving cell is running, then:
the user equipment stops the first timer or the user equipment stops and resets the first timer.
Wherein the first timer is used for: if the first timer times out, the user equipment activates a default downlink bandwidth part on the service cell, or the user equipment converts the activated downlink bandwidth part to the default downlink bandwidth part on the service cell.
Further, the user equipment starts or restarts the first timer when the random access contention resolution is successful, or starts or restarts the first timer when the user equipment successfully receives the random access response message,
in this embodiment, the uplink bandwidth portion and the downlink bandwidth portion have a correspondence relationship, and the user equipment and the network equipment send the message on the uplink bandwidth portion and the downlink bandwidth portion having the correspondence relationship, so that the network equipment is prevented from sending the RAR and the like on all the matched downlink bandwidth portions, and thus downlink resources are greatly saved.
Fig. 8 is an interactive flowchart of a third embodiment of a random access processing method provided by the present application, and as shown in fig. 8, the random access process includes:
S801, the user equipment selects a random access preamble from a random access preamble set, and selects a random access channel resource from a random access channel resource set.
Specifically, the set of random access preambles and the set of random access channel resources correspond to a first downlink bandwidth portion. That is, the random access preamble set and the random access channel resource set have a correspondence relationship with the first downlink bandwidth portion. The correspondence here can be understood in particular as: when the UE performs random access, the UE needs to select a random access channel resource in a random access channel resource set of one of its configured uplink bandwidth parts, and select a random access preamble from a random access preamble set of the one uplink bandwidth part, and at the same time, the UE needs to receive an RAR message on the first downlink bandwidth part. Therefore, the set of random access channel resources and the set of random access preambles of the uplink bandwidth portion have a correspondence with the first downlink bandwidth portion.
Wherein the random access preamble set is a random access preamble set of a sixth uplink bandwidth portion.
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel of the sixth uplink bandwidth part.
The frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel of the sixth uplink bandwidth part.
The sixth uplink bandwidth portion may specifically be:
an Initial uplink bandwidth portion (Initial UL BWP) of the user equipment on the serving cell. The Initial UL BWP may be 1) an Initial UL BWP in which the UE is in an idle state, or 2) an Initial UL BWP in which the network device configures the UE in a connected state. For 1), the Initial UL BWP is a ULBWP configured by the UE in system information indicated or associated with a synchronization signal block Cell defining SS Block of a defined cell on the serving cell. For 2), the Initial UL BWP is an uplink bandwidth portion configured by the network device in a common configuration element of the serving cell of the UE; the initial uplink bandwidth portion may also be referred to as an uplink bandwidth portion defining a cell.
Or, a first active uplink bandwidth portion (First Active UL BWP) of the user equipment on the serving cell. When the serving cell of First Active UL BWP UE is activated, the first uplink bandwidth part of the serving cell activated simultaneously is configured in a special configuration cell of the serving cell by a network device;
Or, the Default uplink bandwidth part (Default UL BWP) of the user equipment on the serving cell. The default UL BWP is an activated uplink bandwidth part to which the UE rolls back after no uplink data transmission for a period of time, and is configured in a cell-specific configuration cell of the serving cell by the network device;
alternatively, the network device configures or indicates for the user equipment one of the uplink bandwidth parts of the random access preamble that can be transmitted by configuring or indicating in a dedicated configuration cell of the serving cell.
Wherein, the serving cell is a serving cell for transmitting the random access preamble by the UE.
S802, the user equipment sends a random access preamble on a sixth uplink bandwidth part.
S803, the user equipment receives the random access response message on the first downlink bandwidth part.
The first downlink bandwidth part is the downlink bandwidth part currently activated by the UE.
As an optional implementation manner, when the ue meets any one of the following conditions, if the uplink bandwidth portion activated by the ue on the serving cell is not the sixth uplink bandwidth portion, the ue activates the sixth uplink bandwidth portion and deactivates the current uplink bandwidth portion, or the ue switches from the current uplink bandwidth portion to the sixth uplink bandwidth portion;
(1) The time calibration timer TAT associated with the serving cell of the user equipment expires.
(2) The number of times the user equipment transmits the scheduling request reaches the maximum allowable transmission number.
(3) And the user equipment receives signaling sent by the network equipment and indicating the user equipment to initiate the random access process.
(4) When the user equipment performs the random access process;
(5) The user equipment selects the random access preamble and the random access channel resource;
(6) And when the user equipment transmits the random access preamble.
As another alternative embodiment, when the ue needs to initiate the random access procedure, if the uplink bandwidth portion activated by the ue on the serving cell is the fifth uplink bandwidth portion, the ue activates the fourth uplink bandwidth portion and deactivates the fifth uplink bandwidth portion, or the ue switches from the fifth uplink bandwidth portion to the fourth uplink bandwidth portion. After completing activating the fourth bandwidth part, the user equipment starts a random access preamble and random access channel resource selection process or starts a random access process.
Further, optionally, if the random access is non-contention random access, the ue performs uplink transmission on the sixth uplink bandwidth portion, that is, sends uplink data and/or signaling to the network device, where the physical resource used by the uplink transmission is a physical resource indicated by the uplink grant UL grant in the random access response message.
In this embodiment, the UE sends the random access preamble on a specific uplink bandwidth portion, and receives the RAR on a currently activated downlink bandwidth portion, and for non-contention random access, the method can enable the UE to avoid performing downlink BWP conversion, and can ensure that the UE does not interrupt downlink data reception when there is downlink data reception.
Fig. 9 is an interaction flow chart of a fourth embodiment of a random access processing method provided by the present application, and as shown in fig. 9, the random access process includes:
and S901, the network equipment sends a second message to the UE.
The second message includes configuration information indicating a correspondence of the first downstream bandwidth portion and a seventh upstream bandwidth portion. The second message may specifically be a radio resource reconfiguration message. .
The specific implementation manner of the configuration information in the second message comprises:
implementation 1: the configuration cell of the downlink bandwidth part includes an identification BWP ID of the uplink bandwidth part corresponding to the downlink bandwidth part. Optionally, the uplink bandwidth portion is an uplink bandwidth portion configured by the network device for the UE before the first message is sent.
Implementation 2: the configuration cell of the downlink bandwidth part includes the configuration cell of the uplink bandwidth part corresponding to the downlink bandwidth part. The configuration information of the uplink bandwidth part is contained in the configuration cells of the uplink bandwidth part. Optionally, the uplink bandwidth part is an uplink bandwidth part configured by the network device for the UE through the second message.
Implementation 3: in the second message, the configuration of the downstream bandwidth part and the configuration of the upstream bandwidth part are contained in the same BWP configuration element.
The configuration information of the uplink bandwidth part comprises at least one of the following information:
(1) Frequency domain location of the upstream bandwidth portion.
(2) The bandwidth of the upstream bandwidth portion.
(3) The bandwidth part identification of the upstream bandwidth part.
The configuration information of the downlink bandwidth part includes at least one of the following information:
(1) Frequency domain location of the downstream bandwidth portion.
(2) The bandwidth of the downstream upstream bandwidth portion.
(3) A bandwidth part identification of the downstream bandwidth part.
S902, the user equipment selects a random access preamble from the random access preamble set, and selects a random access channel resource from the random access channel resource set.
Specifically, at least one of the set of random access preambles or the set of random access channel resources corresponds to the first downlink bandwidth portion. That is, at least one of the random access preamble set or the random access channel resource set has a correspondence with the first downlink bandwidth part. The correspondence here can be understood in particular as: when the UE performs random access, if the UE needs to receive the RAR on the first downlink BWP, the UE can select only the random access preamble transmitted from the set of random access preambles, or can select only the random access channel resources from the set of random access channel resources, or can select only the random access preamble transmitted from the set of random access preambles, and can select only the random access channel resources from the set of random access channel resources.
The set of random access channel resources includes at least one of time domain resources of a random access channel or frequency domain resources of a random access channel.
The first downlink bandwidth part is an activated downlink bandwidth part when the user equipment performs a random access process. For the random access procedure described above, there may be several explanations as follows:
explanation 1: and when the UE initiates the random access process. The method comprises 1) when a MAC entity of UE triggers a random access process; 2) When RRC of UE triggers random access procedure; 3) When the UE receives a PDCCH indication sent by the network equipment and triggers a random access process; 3) And when the UE receives the RRC signaling sent by the network equipment and triggers the random access process.
Interpretation 2: the UE starts to perform a random access procedure.
Interpretation 3: the UE starts to open a window for listening to the random access response message.
Optionally, the frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the seventh uplink bandwidth portion, where N is a predefined positive integer.
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access of the eighth uplink bandwidth part of the user equipment.
The random access preamble set is a random access preamble set of an eighth uplink bandwidth portion of the user equipment.
Further, the user equipment selects a random access channel and a random access preamble from the set of random access channel resources and the set of random access preambles determined by the seventh uplink bandwidth portion.
In an alternative embodiment, the eighth upstream bandwidth portion may specifically be:
an Initial uplink bandwidth portion (Initial UL BWP) of the user equipment on the serving cell. The Initial UL BWP may be 1) an Initial UL BWP in which the UE is in an idle state, or 2) an Initial UL BWP in which the network device configures the UE in a connected state. For 1), the Initial UL BWP is a ULBWP configured by the UE in system information indicated or associated with a synchronization signal block Cell defining SS Block of a defined cell on the serving cell. For 2), the Initial UL BWP is an uplink bandwidth portion configured by the network device in a common configuration element of the serving cell of the UE; the initial uplink bandwidth portion may also be referred to as an uplink bandwidth portion defining a cell.
Or, a first active uplink bandwidth portion (First Active UL BWP) of the user equipment on the serving cell. When the serving cell of First Active UL BWP UE is activated, the first uplink bandwidth part of the serving cell activated simultaneously is configured in a special configuration cell of the serving cell by a network device;
Or, the Default uplink bandwidth part (Default UL BWP) of the user equipment on the serving cell. The Default UL BWP is an activated uplink bandwidth part to which the UE rolls back after no uplink data transmission for a period of time, and is configured in a cell-specific configuration cell of the serving cell by the network device;
alternatively, the network device configures or indicates for the user equipment one of the uplink bandwidth parts of the random access preamble that can be transmitted by configuring or indicating in a dedicated configuration cell of the serving cell.
Wherein, the serving cell is a serving cell for transmitting the random access preamble by the UE.
S903, the ue sends a random access preamble on the seventh uplink bandwidth part.
If the uplink bandwidth portion activated by the ue during the random access procedure is a ninth uplink bandwidth portion, that is, the activated uplink bandwidth portion is not the uplink bandwidth portion corresponding to the first downlink bandwidth portion, then the ue activates the seventh uplink bandwidth portion and deactivates the ninth uplink bandwidth portion, or the ue switches from the ninth uplink bandwidth portion to the seventh uplink bandwidth portion;
correspondingly, the user equipment sends the random access preamble through the random access channel resource, comprising:
And the user equipment transmits the random access preamble on the seventh uplink bandwidth part through the random access channel resource.
S904, the user equipment receives a random access response message on the first downlink bandwidth part.
The following steps S905 to S906 are optional steps, and are performed when the random access is a contention-based random access.
S905, the ue sends a message three of the random access procedure on the seventh uplink bandwidth portion.
S906, the user equipment receives a message triple transmission of a scheduling random access process and a physical downlink control channel of a message four transmission of the random access process on a first downlink bandwidth part.
As an optional implementation manner, if the UE receives, during the random access, the control signaling instructing the UE to perform downlink BWP conversion on the first downlink bandwidth portion, that is, deactivates the first downlink bandwidth portion and activates a new downlink bandwidth portion, the UE needs to determine an uplink bandwidth portion corresponding to the new downlink bandwidth portion. If the uplink bandwidth part corresponding to the new DL is the same as the uplink bandwidth part corresponding to the first downlink bandwidth part, or the random access information of the uplink bandwidth part corresponding to the new DL is the same as the random access information corresponding to the first downlink bandwidth part, the UE continues the current random access process; otherwise, the UE re-initiates the random access procedure and keeps the values of the variables and the values of the timer in the random access procedure unchanged.
In this embodiment, the network device sends the second message to the user device in advance to configure an uplink bandwidth portion corresponding to the first downlink bandwidth portion, determines a random access preamble and a random access channel according to the uplink bandwidth portion, and receives the RAR on the first downlink bandwidth portion, that is, the user device and the network device send the message on the corresponding random access channel according to the preset configuration, so that the network device is prevented from sending the RAR and the like on all the matched downlink bandwidth portions, and downlink resources are greatly saved.
Fig. 10 is an interaction flow chart of a fifth embodiment of a random access processing method provided by the present application, and as shown in fig. 10, the random access process includes:
s1001, the network device sends a third message to the UE.
The third message includes random access information and configuration information indicating a correspondence of the first downlink bandwidth part and the random access information. The third message may specifically be a radio resource reconfiguration message.
The specific implementation manner of the configuration information in the third message comprises: the configuration cell of the first downlink bandwidth part contains random access information corresponding to the first downlink bandwidth part.
Wherein the random access information includes at least one of the following information:
(1) Fourth configuration information for indicating random access of frequency domain resources of the random access channel. Specifically, according to the fourth configuration information, the position of the frequency domain resource of the random access channel, that is, the number and the position of the physical resource blocks occupied by the random access channel on the frequency domain, may be determined.
(2) Fifth configuration information for indicating random access of time domain resources of the random access channel. Specifically, according to the fifth configuration information, the location of the time domain resource of the random access channel, that is, the Frame number (Frame number) and the occupied Symbol (Symbol) of the random access channel in the time domain, or the mini-Slot (mini-Slot), or the Slot (Slot), or the number and the number of subframes (subframes) may be determined.
(3) Sixth configuration information for indicating random access of the random access preamble set. And in particular, the available random access preamble ID may be determined according to the sixth configuration information.
The fourth configuration information, the fifth configuration information and the sixth configuration information may be configuration information of frequency domain resources of a specific random access channel, configuration information of time domain resources of a random access channel, configuration information of a random access channel preamble, or a random access configuration identifier ID, respectively. The random access configuration identifier ID corresponds to the frequency domain resource of the random access channel, and the time domain resource of the random access channel and the random access channel preamble are pre-configured or pre-defined by the network equipment. Therefore, according to the ID, the UE can determine the frequency domain resource of the random access channel, the time domain resource of the random access channel and the random access channel preamble, respectively.
S1002, the user equipment selects a random access preamble from a random access preamble set, and selects a random access channel from a random access channel resource set.
Specifically, at least one of the set of random access preambles or the set of random access channel resources corresponds to the first downlink bandwidth portion. That is, at least one of the random access preamble set or the random access channel resource set has a correspondence with the first downlink bandwidth part. The correspondence here can be understood in particular as: when the UE performs random access, if the UE needs to receive the RAR on the first downlink BWP, the UE can select only the random access preamble transmitted from the set of random access preambles, or can select only the random access channel resources from the set of random access channel resources, or can select only the random access preamble transmitted from the set of random access preambles, and can select only the random access channel resources from the set of random access channel resources.
The set of random access channel resources includes at least one of time domain resources of a random access channel or frequency domain resources of a random access channel.
The first downlink bandwidth part is an activated downlink bandwidth part when the user equipment performs a random access process. For the random access procedure described above, there may be several explanations as follows:
explanation 1: and when the UE initiates the random access process. The method comprises 1) when a MAC entity of UE triggers a random access process; 2) When RRC of UE triggers random access procedure; 3) When the UE receives a PDCCH indication sent by the network equipment and triggers a random access process; 3) And when the UE receives the RRC signaling sent by the network equipment and triggers the random access process.
Interpretation 2: the UE starts to perform a random access procedure.
Interpretation 3: the UE starts to open a window for listening to the random access response message.
The method for determining the set of random access channel resources and the set of random access preambles when the random access information corresponding to the first downlink bandwidth portion is different is described below, respectively.
1. The random access configuration includes only the fourth configuration information.
In this case the number of the elements to be formed is,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the fourth configuration information.
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel corresponding to the third downlink bandwidth part of the user equipment.
The random access preamble set is the same as the random access preamble set corresponding to the third downlink bandwidth part of the user equipment.
2. The random access configuration includes only the fifth configuration information.
In this case the number of the elements to be formed is,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the fifth configuration information.
The frequency domain resource of the random access channel in the random access channel resource set is the same as the frequency domain resource of the random access channel corresponding to the third downlink bandwidth part of the user equipment.
The random access preamble set is the same as the random access preamble set corresponding to the third downlink bandwidth part of the user equipment.
3. The random access configuration includes only the sixth configuration information.
In this case the number of the elements to be formed is,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel corresponding to the third downlink bandwidth part of the user equipment.
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel corresponding to the third downlink bandwidth part of the user equipment.
The random access preamble set is a random access preamble set indicated by the sixth configuration information of the ue.
4. The random access configuration includes fourth configuration information and fifth configuration information.
In this case the number of the elements to be formed is,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the fourth configuration information.
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the fifth configuration information.
The random access preamble set is the same as the random access preamble set corresponding to the third downlink bandwidth part of the user equipment.
5. The random access configuration includes fourth configuration information and sixth configuration information.
In this case the number of the elements to be formed is,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the fourth configuration information.
The random access preamble set is a random access preamble set indicated by the sixth configuration information of the ue.
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel corresponding to the third downlink bandwidth part of the user equipment.
6. The random access configuration includes fifth configuration information and sixth configuration information.
In this case the number of the elements to be formed is,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the fifth configuration information.
The random access preamble set is a random access preamble set indicated by the sixth configuration information of the ue.
The frequency domain resource of the random access channel in the random access channel resource set is the same as the frequency domain resource of the random access channel corresponding to the third downlink bandwidth part of the user equipment.
7. The random access configuration includes fourth configuration information, fifth configuration information, and sixth configuration information.
In this case the number of the elements to be formed is,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the fourth configuration information.
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the fifth configuration information.
The random access preamble set is a random access preamble set indicated by the sixth configuration information of the ue.
Optionally, for the "third downlink bandwidth portion" referred to in the above cases, it may specifically be the following downlink bandwidth portion:
an Initial uplink bandwidth portion (Initial UL BWP) of the user equipment on the serving cell. The Initial UL BWP may be 1) an Initial UL BWP in which the UE is in an idle state, or 2) an Initial UL BWP in which the network device configures the UE in a connected state. For 1), the Initial UL BWP is a ULBWP configured by the UE in system information indicated or associated with a synchronization signal block Cell defining SS Block of a defined cell on the serving cell. For 2), the Initial UL BWP is an uplink bandwidth portion configured by the network device in a common configuration element of the serving cell of the UE; the initial uplink bandwidth portion may also be referred to as an uplink bandwidth portion defining a cell.
Or, a first active uplink bandwidth portion (First Active UL BWP) of the user equipment on the serving cell. When the serving cell of First Active UL BWP UE is activated, the first uplink bandwidth portion of the serving cell that is activated simultaneously is configured by the network device in a dedicated configuration cell of the serving cell.
Or, the Default uplink bandwidth part (Default UL BWP) of the user equipment on the serving cell. The Default UL BWP is an activated uplink bandwidth part to which the UE rolls back after no uplink data transmission for a period of time, and is configured in a cell-specific configuration cell of the serving cell by the network device;
Alternatively, the network device configures or indicates for the user equipment one of the uplink bandwidth parts of the random access preamble that can be transmitted by configuring or indicating in a dedicated configuration cell of the serving cell.
Wherein, the serving cell is a serving cell for transmitting the random access preamble by the UE.
Further, the ue determines a set of random access channel resources and a set of random access preambles according to the specific configuration information in the third message when one of the above conditions is satisfied, and selects a random access preamble and a random access channel from the set of random access channel resources and the set of random access preambles.
S1003, the user equipment sends the random access preamble on a tenth uplink bandwidth.
Wherein the tenth uplink bandwidth part includes frequency domain resources of the random access channel in the random access channel resource set.
If the uplink bandwidth portion activated by the ue during the random access procedure is an eleventh uplink bandwidth portion, that is, the activated uplink bandwidth portion is not the uplink bandwidth portion corresponding to the first downlink bandwidth portion, then the ue activates the tenth uplink bandwidth portion and deactivates the eleventh uplink bandwidth portion, or the ue switches from the eleventh uplink bandwidth portion to the tenth uplink bandwidth portion;
Correspondingly, the user equipment sends the random access preamble through the random access channel resource, comprising:
and the user equipment transmits the random access preamble through the random access channel resource on the tenth uplink bandwidth part.
S1004, the network device sends a random access response message on the first downlink bandwidth part.
The following steps S1005-S1006 are optional steps, which are performed when the random access is a contention-based random access.
S1005, the user equipment sends a message III of the random access process on the tenth uplink bandwidth part.
S1006, the network equipment receives physical downlink control channels for scheduling message triple transmission of the random access process and message four transmission of the random access process on the first downlink bandwidth part.
As an optional implementation manner, if the UE receives, during the random access, the control signaling instructing the UE to perform downlink BWP conversion on the first downlink bandwidth portion, that is, deactivates the first downlink bandwidth portion and activates a new downlink bandwidth portion, the UE needs to determine random access information corresponding to the new downlink bandwidth portion. If the random access information corresponding to the new DL is the same as the random access information corresponding to the first downlink bandwidth part, the UE continues the current random access process; otherwise, the UE re-initiates the random access procedure and keeps the values of the variables and the values of the timer in the random access procedure unchanged.
In this embodiment, the network device sends the first message to the user device in advance to configure the random access information corresponding to the first downlink bandwidth portion, determines the random access preamble and the random access channel according to the random access information, and receives the RAR on the first downlink bandwidth portion, that is, the user device and the network device send the message on the corresponding random access channel according to the preset configuration, so that the network device is prevented from sending the RAR and the like on all the matched downlink bandwidth portions, and downlink resources are greatly saved.
Fig. 11 is an interaction flow chart of a sixth embodiment of a random access processing method provided by the present application, as shown in fig. 11, the random access process includes:
s1101, the network device sends a fourth message to the user device.
The fourth message includes configuration information indicating a correspondence of the twelfth bandwidth portion and the first downlink bandwidth portion. The fourth message may specifically be a radio resource reconfiguration message.
The specific implementation manner of the configuration information in the fourth message includes:
implementation 1: the configuration cell of the uplink bandwidth part contains random access information of the uplink bandwidth part and an identifier BWP ID of the downlink bandwidth part corresponding to the uplink bandwidth part.
Implementation 2: the configuration cell of the first uplink bandwidth part contains random access information of the uplink bandwidth part and configuration information of a downlink bandwidth part corresponding to the uplink bandwidth part.
Implementation 3: in the fourth message, configuration information of the uplink bandwidth part and DLBWP corresponding to the uplink bandwidth part are contained in the same BWP configuration element. The random access information of the uplink bandwidth part is contained in a random access configuration cell containing the BWP ID of the uplink bandwidth part.
Wherein, the configuration information of the uplink bandwidth part includes at least one of the following information:
(1) The frequency domain position of the uplink bandwidth part.
(2) The bandwidth of the uplink bandwidth part.
(3) The bandwidth part of the upstream bandwidth part identifies the BWP ID.
The configuration information of the downlink bandwidth part corresponding to the uplink bandwidth part comprises at least one of the following information:
(1) The frequency domain position of the downlink bandwidth part.
(2) The bandwidth of the downlink bandwidth part.
(3) The bandwidth part of the downstream bandwidth part identifies the BWP ID.
Wherein the random access information includes at least one of the following information:
(1) First configuration information for indicating random access of frequency domain resources of a random access channel. Specifically, according to the first configuration information, the position of the frequency domain resource of the random access channel, that is, the number and the position of the physical resource blocks occupied by the random access channel on the frequency domain, may be determined.
(2) Second configuration information for indicating random access of time domain resources of the random access channel. Specifically, according to the second configuration information, the location of the time domain resource of the random access channel, that is, the Frame number (Frame number) and the occupied Symbol (Symbol) of the random access channel in the time domain, or the mini-Slot (mini-Slot), or the Slot (Slot), or the number and the number of subframes (subframes) may be determined.
(3) Third configuration information for indicating random access of the set of random access preambles. And in particular, the available random access preamble ID can be determined according to the third configuration information.
The first configuration information, the second configuration information and the third configuration information may be configuration information of frequency domain resources of a specific random access channel, configuration information of time domain resources of a random access channel, configuration information of a random access channel preamble, or a random access configuration identifier ID, respectively. The random access configuration identifier ID corresponds to the frequency domain resource of the random access channel, and the time domain resource of the random access channel and the random access channel preamble are pre-configured or pre-defined by the network equipment. Therefore, according to the ID, the UE can determine the frequency domain resource of the random access channel, the time domain resource of the random access channel and the random access channel preamble, respectively.
S1102, the user equipment selects a random access preamble from the random access preamble set, and selects a random access channel resource from the random access channel resource set.
Specifically, at least one of the set of random access preambles or the set of random access channel resources corresponds to the first downlink bandwidth portion. That is, at least one of the random access preamble set or the random access channel resource set has a correspondence with the first downlink bandwidth part. The correspondence here can be understood in particular as: when the UE performs random access, if the UE needs to receive the RAR on the first downlink BWP, the UE can select only the random access preamble transmitted from the set of random access preambles, or can select only the random access channel resources from the set of random access channel resources, or can select only the random access preamble transmitted from the set of random access preambles, and can select only the random access channel resources from the set of random access channel resources.
The set of random access channel resources includes at least one of time domain resources of a random access channel or frequency domain locations of a random access channel.
The first downlink bandwidth part is a downlink bandwidth part corresponding to a twelfth uplink bandwidth part of the user equipment.
The twelfth uplink bandwidth part is an uplink bandwidth part activated by the user equipment when random access is performed.
The following describes a procedure of composing a set of random access channel resources and a set of random access preambles when the random access configuration information of the twelfth uplink bandwidth part is different, respectively.
1. The random access configuration information of the twelfth uplink bandwidth part includes only the seventh configuration information.
In this case the number of the elements to be formed is,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the seventh configuration information of the random access.
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel of the thirteenth uplink bandwidth part of the user equipment.
The random access preamble set is identical to the random access preamble set of the thirteenth uplink bandwidth part of the user equipment.
2. The random access configuration information of the twelfth uplink bandwidth part includes only eighth configuration information.
In this case the number of the elements to be formed is,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the eighth configuration information of the random access.
The frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the twelfth uplink bandwidth part, where N is a predefined positive integer.
The random access preamble set is the same as the random access preamble set of the thirteenth uplink bandwidth part of the user equipment.
3. The random access configuration information of the twelfth uplink bandwidth part includes only the ninth configuration information.
In this case the number of the elements to be formed is,
the random access preamble set is a random access preamble set indicated by the ninth configuration information of the random access.
The frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the twelfth uplink bandwidth part, where N is a predefined positive integer.
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access of the thirteenth uplink bandwidth part of the user equipment.
4. The random access configuration information of the twelfth uplink bandwidth part includes seventh configuration information and eighth configuration information.
In this case the number of the elements to be formed is,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the seventh configuration information of the random access.
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel indicated by the eighth configuration information of the random access.
The random access preamble set is the same as the random access preamble set of the thirteenth uplink bandwidth portion of the user equipment.
5. The random access configuration information of the twelfth uplink bandwidth part comprises seventh configuration information and ninth configuration information;
in this case the number of the elements to be formed is,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the seventh configuration information of the random access.
The random access preamble set is a random access preamble set indicated by the ninth configuration information of the random access.
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel of the thirteenth uplink bandwidth part of the user equipment.
6. The random access configuration information of the twelfth uplink bandwidth part includes eighth configuration information and ninth configuration information.
In this case the number of the elements to be formed is,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the eighth configuration information of the random access.
The random access preamble set is a random access preamble set indicated by the ninth configuration information of the random access.
The frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the twelfth uplink bandwidth part, where N is a predefined positive integer.
7. The random access configuration information of the twelfth uplink bandwidth part includes seventh configuration information, eighth configuration information, and ninth configuration information.
In this case the number of the elements to be formed is,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the seventh configuration information of the random access.
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the eighth configuration information of the random access.
The random access preamble set is a random access preamble set indicated by the ninth configuration information of the random access.
Optionally, for the "thirteenth upstream bandwidth portion" referred to in the above cases, it may specifically be the following form:
initial uplink bandwidth portion, initial UL BWP, of the user equipment on the serving cell. The Initial UL BWP may be 1) an Initial UL BWP in which the UE is in an idle state, or 2) an Initial UL BWP in which the network device configures the UE in a connected state. For 1), the Initial UL BWP is a ULBWP configured by the UE in system information indicated or associated with a synchronization signal block Cell defining SS Block of a defined cell on the serving cell. For 2), the Initial UL BWP is an uplink bandwidth portion configured by the network device in a common configuration element of the serving cell of the UE; the initial uplink bandwidth portion may also be referred to as an uplink bandwidth portion defining a cell.
Or the first active upstream bandwidth portion First Active UL BWP of the user equipment on the serving cell. When the serving cell of First Active UL BWP UE is activated, the first uplink bandwidth part of the serving cell activated simultaneously is configured in a special configuration cell of the serving cell by a network device;
Or, the Default uplink bandwidth part Default UL BWP of the user equipment on the serving cell. The Default UL BWP is an activated uplink bandwidth part to which the UE rolls back after no uplink data transmission for a period of time, and is configured in a cell-specific configuration cell of the serving cell by the network device;
alternatively, the network device configures or indicates for the user equipment one of the uplink bandwidth parts of the random access preamble that can be transmitted by configuring or indicating in a dedicated configuration cell of the serving cell.
Wherein, the serving cell is a serving cell for transmitting the random access preamble by the UE.
Further, the ue determines a set of random access channel resources and a set of random access preambles according to the specific configuration information in the fourth message when one of the above conditions is satisfied, and selects a random access preamble and a random access channel from the set of random access channel resources and the set of random access preambles.
S1103, the ue sends the random access preamble on the twelfth uplink bandwidth.
S1104, the user equipment receives the RAR on the first downlink bandwidth segment.
If the downlink bandwidth part activated by the ue during the random access procedure is a fourth downlink bandwidth part, that is, the activated downlink bandwidth part is not the downlink bandwidth part corresponding to the twelfth uplink bandwidth part, then the ue activates the first downlink bandwidth part and deactivates the fourth downlink bandwidth part, or the ue switches from the fourth downlink bandwidth part to the first downlink bandwidth part;
The following steps S1105-S1106 are optional steps, which are performed when the random access is a contention-based random access.
S1105, the ue sends a message three of the random access procedure on the twelfth uplink bandwidth portion.
And S1106, the user equipment receives a physical downlink control channel for scheduling message triple transmission of the random access process and message four transmission of the random access process on the fourth downlink bandwidth part.
In this embodiment, the network device sends the fourth message to the user device in advance to configure the random access information corresponding to the twelfth uplink bandwidth portion, determines the random access preamble and the random access channel according to the random access information, and receives the RAR on the fourth downlink bandwidth portion, that is, the user device and the network device send the message on the corresponding random access channel according to the preset configuration, so that the network device is prevented from sending the RAR on all the matched downlink bandwidth portions, and downlink resources are greatly saved.
It should be noted that the processing methods of the first and third embodiments may be combined, the processing methods of the second and third embodiments may be combined, the processing methods of the fourth and third embodiments may be combined, the processing methods of the fifth and third embodiments may be combined, and the processing methods of the sixth and third embodiments may be combined. The method specifically comprises the following steps:
If the ue performs the contention-based random access procedure, the processing method of the second embodiment, the processing method of the fourth embodiment, the processing method of the fifth embodiment, or the processing method of the sixth embodiment is adopted;
if the ue performs a non-contention based random access procedure, the processing method of the third embodiment is adopted.
In addition, for the first embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment, at least one of the random access preamble set or the random access channel resource set corresponds to the first downlink bandwidth portion, specifically may be:
at least one of the random access preamble set and the random access channel resource set corresponds to a first control resource set CORESET corresponding to the first downlink bandwidth portion, the first CORESET indicating a time-frequency domain resource set for the user equipment to receive or search for a downlink control channel.
The downlink control channel is used for scheduling any downlink transmission and/or uplink transmission, or the downlink control channel is used for scheduling at least one of random access procedure message two transmission, random access procedure message triple transmission and random access procedure message four transmission.
In another embodiment, the serving cell of the ue in the present application may be a primary serving cell PCell of the ue or a secondary serving cell SCell of the ue. The primary serving cell comprises a primary serving cell in the primary cell group MCG and a primary serving cell in the secondary cell group SCG of the user equipment.
Fig. 12 is a block diagram of a first embodiment of a ue according to the present application, as shown in fig. 12, where the ue includes: a processing module 1201, a transmitting module 1202 and a receiving module 1203.
A processing module 1201 is configured to select a random access preamble from a set of random access preambles and select a random access channel resource from a set of random access channel resources.
A transmitting module 1202, configured to transmit the random access preamble through the random access channel resource.
A receiving module 1203 is configured to receive the random access response message on the first downlink bandwidth portion.
Wherein at least one of the set of random access preambles or the set of random access channel resources corresponds to the first downlink bandwidth portion;
the random access channel resources include at least one of time domain resources of a random access channel or frequency domain resources of a random access channel.
Further, the first downlink bandwidth part is an activated downlink bandwidth part when the user equipment performs the random access procedure.
Further, at least one of the set of random access preambles or the set of random access channel resources corresponds to the first downlink bandwidth portion, comprising:
at least one of the random access preamble set and the random access channel resource set corresponds to a first control resource set of the first downlink bandwidth portion, the first control resource set indicating a time-frequency domain resource set for the user equipment to receive or search for a downlink control channel.
The downlink control channel is used for scheduling any downlink transmission and/or uplink transmission, or the downlink control channel is used for scheduling at least one of random access procedure message two transmission, random access procedure message triple transmission and random access procedure message four transmission, the random access procedure message two is a random access response message, the random access procedure message three is uplink transmission scheduled for the first time, and the random access procedure message four is a random access contention resolution message.
In an alternative embodiment, the receiving module 1203 is further configured to:
Receiving a first message sent by a network device, wherein the first message comprises configuration information indicating the corresponding relation between the first downlink bandwidth part and the first uplink bandwidth part and random access information of the first uplink bandwidth part; or, the first message includes configuration information indicating a correspondence between the first downlink bandwidth portion and random access information and a first uplink bandwidth portion corresponding to the random access information.
Wherein, the liquid crystal display device comprises a liquid crystal display device,
the random access information includes at least one of the following information:
first configuration information for indicating random access of frequency domain resources of a random access channel;
second configuration information for indicating random access of time domain resources of the random access channel;
third configuration information for indicating random access of the set of random access preambles.
Further, the random access information only includes the first configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment;
The set of random access preambles is the same as a set of random access preambles configured on the second uplink bandwidth portion of the user equipment.
Further, the random access information only includes the second configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the first uplink bandwidth part, wherein N is a predefined positive integer;
the set of random access preambles is the same as a set of random access preambles configured on a second uplink bandwidth portion of the user equipment.
Further, the random access information of the first uplink bandwidth part only includes the third configuration information;
in response to this, the control unit,
the random access preamble set is a random access preamble set indicated by the third configuration information;
the frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the first uplink bandwidth part, wherein N is a predefined positive integer;
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
Further, the random access information of the first uplink bandwidth part includes the first configuration information and the second configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the set of random access preambles is the same as a set of random access preambles configured on a second uplink bandwidth portion of the user equipment.
Further, the random access information of the first uplink bandwidth part includes first configuration information and third configuration information of the random access;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
The random access preamble set is a random access preamble set indicated by the third configuration information of the random access;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
Further, the random access information of the first uplink bandwidth part includes the second configuration information and the third configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the random access preamble set is a random access preamble set indicated by the third configuration information;
the frequency domain resources of the random access channel in the random access channel resource set are central N physical resource blocks of the first uplink bandwidth part, wherein N is a predefined positive integer.
Further, the random access information of the first uplink bandwidth part includes the first configuration information, the second configuration information and the third configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the random access preamble set is the random access preamble set indicated by the third configuration information.
Further, the second uplink bandwidth portion is:
an initial uplink bandwidth part of the user equipment on a serving cell;
or a first active uplink bandwidth portion of the user equipment on the serving cell;
or a default uplink bandwidth part of the user equipment on the service cell;
or the network equipment configures or indicates the uplink bandwidth part for the user equipment through special signaling;
and the serving cell sends the random access preamble to the user equipment.
Further, the sending module 1202 is specifically configured to:
and transmitting the random access preamble on the first uplink bandwidth part through the random access channel resource.
Further, the processing module 1201 is further configured to:
and when the uplink bandwidth part activated by the user equipment in the random access process is a third uplink bandwidth part, activating the first uplink bandwidth part and deactivating the third uplink bandwidth part, or switching from the third uplink bandwidth part to the first uplink bandwidth part.
Correspondingly, the sending module 1202 is specifically configured to:
and transmitting the random access preamble on the first uplink bandwidth part through the random access channel resource.
Further, if the random access procedure is a contention-based random access procedure, the sending module 1202 is further configured to:
and sending a message III of the random access process on the first uplink bandwidth part.
Correspondingly, the receiving module 1203 is further configured to:
and receiving a physical downlink control channel for scheduling message triple transmission of the random access process and message four transmission of the random access process on the first downlink bandwidth part.
In an optional implementation manner, the first downlink bandwidth portion is a downlink bandwidth portion corresponding to a fourth uplink bandwidth portion of the ue.
The fourth uplink bandwidth part is an uplink bandwidth part in which the user equipment is configured with a random access preamble set and a random access channel resource set on a serving cell.
The random access preamble set is a random access preamble set configured on the fourth uplink bandwidth portion.
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel configured on the fourth uplink bandwidth part.
The frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel configured on the fourth uplink bandwidth part.
Accordingly, the sending module 1202 is specifically configured to:
and transmitting the random access preamble on the fourth uplink bandwidth part through the random access channel resource.
And the serving cell sends the random access preamble to the user equipment.
Further, the common configuration of the serving cell includes a configuration of the first downlink bandwidth portion and a configuration of the fourth uplink bandwidth portion.
The common configuration of the serving cells is included in the system information transmitted on the first downlink bandwidth part.
Further, the common configuration or the dedicated configuration of the serving cell includes the configuration of the first downlink bandwidth portion and the configuration of the fourth uplink bandwidth portion.
The common configuration of the serving cell is sent by the network device to the user device by dedicated signaling.
Further, the processing module 1201 is further configured to:
when any one of the following conditions occurs, if the uplink bandwidth portion activated by the ue on the serving cell is a fifth uplink bandwidth portion, activating the fourth uplink bandwidth portion, and deactivating the fifth uplink bandwidth portion, or switching the ue from the fifth uplink bandwidth portion to the third uplink bandwidth portion:
A time calibration timer TAT associated with the serving cell of the user equipment expires;
the number of times that the user equipment transmits the scheduling request reaches the maximum allowable transmission number;
the user equipment receives a signaling sent by the network equipment and indicating the user equipment to initiate the random access process;
when the user equipment performs the random access process;
the user equipment selects the random access preamble and the random access channel resource;
and when the user equipment transmits the random access preamble.
Further, the processing module 1201 is further configured to:
when any one of the following conditions occurs, if the downlink bandwidth portion activated by the user equipment on the serving cell is a second downlink bandwidth portion, activating the first downlink bandwidth portion, and deactivating the second downlink bandwidth portion, or switching the user equipment from the second downlink bandwidth portion to the first downlink bandwidth portion:
the time calibration timer TAT of the user equipment is overtime;
the number of times of sending the scheduling request of the user equipment reaches the maximum allowable sending number;
the user equipment receives a signaling sent by the network equipment and indicating the user equipment to initiate a random access process;
When the user equipment performs the random access process;
when the user equipment receives the random access response message;
and when the user equipment transmits the random access preamble.
Further, the processing module 1201 is specifically configured to:
if a first timer configured by the user equipment on the serving cell is running, then:
and stopping the first timer, or stopping and resetting the first timer.
Wherein the first timer is configured to: and if the first timer is overtime, the user equipment activates a default downlink bandwidth part on the service cell, or the user equipment converts the activated downlink bandwidth part to the default downlink bandwidth part on the service cell.
Further, the processing module 1201 is further configured to:
starting or restarting the first timer when contention resolution of the random access procedure is successful;
or alternatively, the process may be performed,
and the user equipment starts or restarts the first timer when the random access response message is successfully received.
Further, if the random access is a contention-based random access, then:
the sending module 1202 is further configured to:
Transmitting a message three of the random access procedure on the fourth uplink bandwidth portion;
the receiving module 1203 is further configured to:
and receiving a physical downlink control channel for scheduling message triple transmission of the random access process and message four transmission of the random access process on the first downlink bandwidth part.
In an alternative embodiment, the sending module 1202 is specifically further configured to:
and transmitting the random access preamble on the sixth uplink bandwidth part through the random access channel resource.
Wherein, the liquid crystal display device comprises a liquid crystal display device,
the random access preamble set is a random access preamble set configured on the sixth uplink bandwidth portion.
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel configured on the sixth uplink bandwidth part.
The frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel configured on the sixth uplink bandwidth part.
Further, the sixth upstream bandwidth portion is:
an initial uplink bandwidth part of the user equipment on a serving cell;
or a first active uplink bandwidth portion of the user equipment on the serving cell;
Or a default uplink bandwidth part of the user equipment on the service cell;
the network equipment configures or indicates an uplink bandwidth part for the user equipment through special signaling;
and the serving cell sends the random access preamble to the user equipment.
Further, if the random access procedure is a non-contention random access procedure, the sending module 1202 is further configured to:
and carrying out uplink transmission on the sixth uplink bandwidth part, wherein the physical resource used by the uplink transmission is the physical resource indicated by the uplink authorization in the random access response.
Fig. 13 is a block diagram of a first embodiment of a network device according to the present application, as shown in fig. 13, where the network device includes: a receiving module 1301, a processing module 1302, and a transmitting module 1303.
A receiving module 1301, configured to receive a random access preamble sent by a user equipment through a random access channel resource, where the random access preamble is selected by the user equipment from a random access preamble set, and the random access channel resource is selected by the user equipment from a random access channel resource set;
The processing module 1302 sends a random access response to the user equipment on the first downlink bandwidth part via the sending module 1303.
Wherein at least one of the set of random access preambles or the set of random access channel resources corresponds to the first downlink bandwidth portion.
The random access channel resources include at least one of time domain resources of a random access channel or frequency domain resources of a random access channel.
Further, the first downlink bandwidth part is an activated downlink bandwidth part when the user equipment performs the random access procedure.
Further, at least one of the set of random access preambles or the set of random access channel resources corresponds to the first downlink bandwidth portion, comprising:
at least one of the random access preamble set and the random access channel resource set corresponds to a first control resource set of the first downlink bandwidth portion, the first control resource set indicating a time-frequency domain resource set for the user equipment to receive or search for a downlink control channel.
The downlink control channel is used for scheduling any downlink transmission and/or uplink transmission, or the downlink control channel is used for scheduling at least one of random access procedure message two transmission, random access procedure message triple transmission and random access procedure message four transmission, the random access procedure message two is a random access response message, the random access procedure message three is uplink transmission scheduled for the first time, and the random access procedure message four is a random access contention resolution message.
In an alternative embodiment, the sending module is further configured to:
transmitting a first message to the user equipment, wherein the first message comprises configuration information indicating the corresponding relation between the first downlink bandwidth part and the first uplink bandwidth part and random access information of the first uplink bandwidth part; or, the first message includes configuration information indicating a correspondence between the first downlink bandwidth portion and random access information and a first uplink bandwidth portion corresponding to the random access information.
Wherein, the liquid crystal display device comprises a liquid crystal display device,
the random access information includes at least one of the following information.
First configuration information for indicating random access of frequency domain resources of a random access channel.
Second configuration information for indicating random access of time domain resources of the random access channel.
Third configuration information for indicating random access of the set of random access preambles.
Further, the random access information only includes the first configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment;
The set of random access preambles is the same as a set of random access preambles configured on the second uplink bandwidth portion of the user equipment.
Further, the random access information only includes the second configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the first uplink bandwidth part, wherein N is a predefined positive integer;
the set of random access preambles is the same as a set of random access preambles configured on a second uplink bandwidth portion of the user equipment.
Further, the random access information of the first uplink bandwidth part only includes the third configuration information;
in response to this, the control unit,
the random access preamble set is a random access preamble set indicated by the third configuration information;
the frequency domain resource of the random access channel in the random access channel resource set is the central N physical resource blocks of the first uplink bandwidth part, wherein N is a predefined positive integer;
The time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
Further, the random access information of the first uplink bandwidth part includes the first configuration information and the second configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the set of random access preambles is the same as a set of random access preambles configured on a second uplink bandwidth portion of the user equipment.
Further, the random access information of the first uplink bandwidth part includes first configuration information and third configuration information of the random access;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
The random access preamble set is a random access preamble set indicated by the third configuration information of the random access;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
Further, the random access information of the first uplink bandwidth part includes the second configuration information and the third configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the random access preamble set is a random access preamble set indicated by the third configuration information;
the frequency domain resources of the random access channel in the random access channel resource set are central N physical resource blocks of the first uplink bandwidth part, wherein N is a predefined positive integer.
Further, the random access information of the first uplink bandwidth part includes the first configuration information, the second configuration information and the third configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the random access preamble set is the random access preamble set indicated by the third configuration information.
Further, the second uplink bandwidth portion is:
an initial uplink bandwidth part of the user equipment on a serving cell;
or a first active uplink bandwidth portion of the user equipment on the serving cell;
or a default uplink bandwidth part of the user equipment on the service cell;
or the network equipment configures or indicates the uplink bandwidth part for the user equipment through special signaling;
and the serving cell sends the random access preamble to the user equipment.
Further, the receiving module 1301 is further configured to:
and receiving the random access preamble sent by the user equipment on the first uplink bandwidth part through the random access channel resource.
In an optional implementation manner, the first downlink bandwidth portion is a downlink bandwidth portion corresponding to a fourth uplink bandwidth portion of the ue.
The fourth uplink bandwidth part is an uplink bandwidth part in which the user equipment is configured with a random access preamble set and a random access channel resource set on a serving cell.
The random access preamble set is a random access preamble set configured on the fourth uplink bandwidth portion.
The time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel configured on the fourth uplink bandwidth part.
The frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel configured on the fourth uplink bandwidth part.
Correspondingly, the receiving module 1301 is specifically further configured to:
and receiving the random access preamble sent by the user equipment on the fourth uplink bandwidth part through the random access channel resource.
Further, the common configuration of the serving cell includes the configuration of the first downlink bandwidth portion and the configuration of the fourth uplink bandwidth portion;
the common configuration of the serving cells is included in the system information transmitted on the first downlink bandwidth part.
Further, the public configuration or the private configuration of the serving cell includes the configuration of the first downlink bandwidth part and the configuration of the fourth uplink bandwidth part;
The common configuration of the serving cell is sent by the network device to the user device by dedicated signaling.
In an alternative embodiment, the receiving module 1301 is specifically further configured to:
receiving the random access preamble sent by the user equipment through the random access channel resource on a sixth uplink bandwidth part;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the random access preamble set is a random access preamble set configured on the sixth uplink bandwidth part;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel configured on the sixth uplink bandwidth part;
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel configured on the sixth uplink bandwidth part.
Fig. 14 is an entity block diagram of a ue provided in the present application, as shown in fig. 14, where the ue includes: a memory 1401, and a processor 1402.
The memory 1401 is configured to store program instructions, and the processor 1402 is configured to invoke the program instructions in the memory 1401 to perform the functions of the user equipment in the above-described method embodiment.
Fig. 15 is an entity block diagram of a network device according to the present application, as shown in fig. 15, where the network device includes: a memory 1501 and a processor 1502.
The memory 1501 is used to store program instructions, and the processor 1502 is used to call the program instructions in the memory 1501 to perform the functions of the network device in the above method embodiment.
Fig. 16 is a physical block diagram of a chip 1600 provided in the present application, where the chip 1600 may be used in a user equipment, as shown in fig. 16, and includes: at least one communication interface 1601, at least one processor 1602, at least one memory 1603, wherein the communication interface 1601, the processor 1602 and the memory 1603 are interconnected by a circuit (in some cases also a bus) 1604, the processor 1602 invokes instructions stored in the memory 1603 to perform the functions of the user equipment in the above-described method embodiments.
Fig. 17 is a physical block diagram of a chip 1700 provided by the present application, where the chip 1700 may be used in a network device, as shown in fig. 17, and includes: at least one communication interface 1701, at least one processor 1702, at least one memory 1703, wherein the communication interface 1701, the processor 1702 and the memory 1703 are interconnected by a circuit (in some cases also a bus) 1704, the processor 1702 invoking instructions stored in the memory 1703 to perform the functions of the network device in the above described method embodiments.
Claims (45)
1. A method of random access, comprising:
the method comprises the steps that user equipment receives a message sent by network equipment, wherein the message comprises random access information of an uplink bandwidth part, and the random access information comprises at least one of the following information: first configuration information for indicating random access of frequency domain resources of a random access channel, second configuration information for indicating random access of time domain resources of a random access channel, third configuration information for indicating random access of a random access preamble set;
the user equipment selects a random access preamble from the random access preamble set and selects a random access channel resource from a random access channel resource set; the random access channel resource set comprises frequency domain resources of the random access channel and time domain resources of the random access channel;
the user equipment transmits the selected random access preamble through the selected random access channel resource in the uplink bandwidth part; the uplink bandwidth part is an uplink bandwidth part activated when the user equipment initiates a random access process;
the user equipment receives a random access response message on a first downlink bandwidth part; the first downlink bandwidth part is a downlink bandwidth part corresponding to the uplink bandwidth part; and if the downlink bandwidth part activated by the user equipment when the random access process is initiated is a second downlink bandwidth part, the user equipment is converted from the second downlink bandwidth part to the first downlink bandwidth part.
2. The method of claim 1, wherein the message further comprises configuration information indicating a correspondence of the upstream bandwidth portion and the first downstream bandwidth portion.
3. The method according to claim 1 or 2, wherein at least one of the set of random access preambles and the set of random access channel resources corresponds to a first set of control resources of the first downlink bandwidth portion, the first set of control resources indicating a set of time-frequency domain resources for which the user device receives or searches for a downlink control channel;
the downlink control channel is used for scheduling any downlink transmission and/or uplink transmission, or the downlink control channel is used for scheduling at least one of random access procedure message two transmission, random access procedure message triple transmission and random access procedure message four transmission, the random access procedure message two is a random access response message, the random access procedure message three is uplink transmission scheduled for the first time, and the random access procedure message four is a random access contention resolution message.
4. The method according to claim 1, wherein the random access information comprises only the first configuration information;
In a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment;
the set of random access preambles is the same as a set of random access preambles configured on the second uplink bandwidth portion of the user equipment.
5. The method according to claim 1, wherein the random access information comprises only the second configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the frequency domain resource of the random access channel in the random access channel resource set is N physical resource blocks in the center of the uplink bandwidth part, wherein N is a predefined positive integer;
the set of random access preambles is the same as a set of random access preambles configured on a second uplink bandwidth portion of the user equipment.
6. The method of claim 1, wherein the random access information of the uplink bandwidth portion includes only the third configuration information;
in response to this, the control unit,
the random access preamble set is a random access preamble set indicated by the third configuration information;
the frequency domain resource of the random access channel in the random access channel resource set is N physical resource blocks in the center of the uplink bandwidth part, wherein N is a predefined positive integer;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
7. The method of claim 1, wherein the random access information of the uplink bandwidth portion comprises the first configuration information and the second configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
The set of random access preambles is the same as a set of random access preambles configured on a second uplink bandwidth portion of the user equipment.
8. The method of claim 1, wherein the random access information of the uplink bandwidth portion includes first configuration information and third configuration information of the random access;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the random access preamble set is a random access preamble set indicated by the third configuration information of the random access;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
9. The method of claim 1, wherein the random access information of the uplink bandwidth portion includes the second configuration information and the third configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
The random access preamble set is a random access preamble set indicated by the third configuration information;
the frequency domain resources of the random access channel in the random access channel resource set are central N physical resource blocks of the uplink bandwidth part, wherein N is a predefined positive integer.
10. The method of claim 1, wherein the random access information of the uplink bandwidth portion comprises the first configuration information, the second configuration information, and the third configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the random access preamble set is the random access preamble set indicated by the third configuration information.
11. The method according to any of claims 4-8, wherein the second upstream bandwidth portion is:
an initial uplink bandwidth part of the user equipment on a serving cell;
Or a first active uplink bandwidth portion of the user equipment on the serving cell;
or a default uplink bandwidth part of the user equipment on the service cell;
or the network equipment configures or indicates the uplink bandwidth part for the user equipment through special signaling;
and the serving cell sends the random access preamble to the user equipment.
12. The method according to claim 1, wherein the method further comprises:
and the user equipment transmits the random access preamble through the random access channel resource on the uplink bandwidth part.
13. The method according to claim 12, wherein the method further comprises:
if the uplink bandwidth part activated by the ue during the random access procedure is a third uplink bandwidth part, then:
the user equipment activates the uplink bandwidth part and deactivates the third uplink bandwidth part, or the user equipment switches from the third uplink bandwidth part to the uplink bandwidth part; correspondingly, the ue sends the random access preamble through the random access channel resource, including:
And the user equipment transmits the random access preamble through the random access channel resource on the uplink bandwidth part.
14. The method of claim 13, wherein the method further comprises:
if the random access procedure is a contention-based random access procedure, then:
the user equipment sends a message III of the random access process on the uplink bandwidth part;
and the user equipment receives physical downlink control channels for scheduling message triple transmission of the random access process and message four transmission of the random access process on the first downlink bandwidth part.
15. The method according to claim 1, wherein the first downlink bandwidth portion is a downlink bandwidth portion corresponding to a fourth uplink bandwidth portion of the ue;
the fourth uplink bandwidth part is an uplink bandwidth part in which the user equipment is configured with a random access preamble set and a random access channel resource set on a serving cell;
the random access preamble set is a random access preamble set configured on the fourth uplink bandwidth part;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel configured on the fourth uplink bandwidth part;
The frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel configured on the fourth uplink bandwidth part;
accordingly, the ue sends the random access preamble through the random access channel resource, including:
the user equipment sends the random access preamble through the random access channel resource on the fourth uplink bandwidth part;
and the serving cell sends the random access preamble to the user equipment.
16. The method according to claim 15, wherein the common configuration of the serving cell comprises a configuration of the first downlink bandwidth portion and a configuration of the fourth uplink bandwidth portion;
the common configuration of the serving cells is included in the system information transmitted on the first downlink bandwidth part.
17. The method according to claim 15, wherein the common configuration or the dedicated configuration of the serving cell comprises the configuration of the first downlink bandwidth part and the configuration of the fourth uplink bandwidth part;
the common configuration of the serving cell is sent by the network device to the user device by dedicated signaling.
18. The method of claim 13, wherein the method further comprises:
when any one of the following conditions occurs, if the uplink bandwidth portion activated by the ue on the serving cell is a fifth uplink bandwidth portion, the ue activates a fourth uplink bandwidth portion and deactivates the fifth uplink bandwidth portion, or the ue switches from the fifth uplink bandwidth portion to the third uplink bandwidth portion:
a time calibration timer TAT associated with the serving cell of the user equipment expires;
the number of times that the user equipment transmits the scheduling request reaches the maximum allowable transmission number;
the user equipment receives a signaling sent by the network equipment and indicating the user equipment to initiate the random access process;
when the user equipment performs the random access process;
the user equipment selects the random access preamble and the random access channel resource;
and when the user equipment transmits the random access preamble.
19. The method according to any one of claims 15-18, further comprising:
when any one of the following conditions occurs, if the downlink bandwidth portion activated by the ue on the serving cell is a second downlink bandwidth portion, the ue activates the first downlink bandwidth portion and deactivates the second downlink bandwidth portion, or the ue switches from the second downlink bandwidth portion to the first downlink bandwidth portion:
The time calibration timer TAT of the user equipment is overtime;
the number of times of sending the scheduling request of the user equipment reaches the maximum allowable sending number;
the user equipment receives a signaling sent by the network equipment and indicating the user equipment to initiate a random access process;
when the user equipment performs the random access process;
when the user equipment receives the random access response message;
and when the user equipment transmits the random access preamble.
20. The method of claim 19, wherein the deactivating the second downstream bandwidth portion or the user device transitioning from the second downstream bandwidth portion to the first downstream bandwidth portion comprises:
if a first timer configured by the user equipment on the serving cell is running, then:
the user equipment stops the first timer, or the user equipment stops and resets the first timer;
wherein the first timer is configured to: and if the first timer is overtime, the user equipment activates a default downlink bandwidth part on the service cell, or the user equipment converts the activated downlink bandwidth part to the default downlink bandwidth part on the service cell.
21. The method of claim 20, wherein the method further comprises:
the user equipment starts or restarts the first timer when the contention resolution of the random access process is successful;
or the user equipment starts or restarts the first timer when the random access response message is successfully received.
22. The method according to any one of claims 15-18, 20-21, wherein the method further comprises:
if the random access is a contention-based random access, then:
the user equipment sends a message III of the random access process on the fourth uplink bandwidth part;
and the user equipment receives physical downlink control channels for scheduling message triple transmission of the random access process and message four transmission of the random access process on the first downlink bandwidth part.
23. The method of claim 2, wherein the user equipment transmitting the selected random access preamble over the selected random access channel resource in the uplink bandwidth portion comprises:
the user equipment transmits the random access preamble through the random access channel resource on a sixth uplink bandwidth part;
Wherein, the liquid crystal display device comprises a liquid crystal display device,
the random access preamble set is a random access preamble set configured on the sixth uplink bandwidth part;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel configured on the sixth uplink bandwidth part;
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel configured on the sixth uplink bandwidth part.
24. The method of claim 23, wherein the sixth upstream bandwidth portion is:
an initial uplink bandwidth part of the user equipment on a serving cell;
or a first active uplink bandwidth portion of the user equipment on the serving cell;
or a default uplink bandwidth part of the user equipment on the service cell;
the network equipment configures or indicates an uplink bandwidth part for the user equipment through special signaling;
and the serving cell sends the random access preamble to the user equipment.
25. The method of claim 23, wherein the method further comprises:
And if the random access process is a non-competitive random access process, the user equipment performs uplink transmission on the sixth uplink bandwidth part, wherein the physical resource used by the uplink transmission is a physical resource indicated by uplink authorization in the random access response.
26. A random access method, comprising:
the network equipment sends a message to the user equipment, wherein the message comprises random access information of an uplink bandwidth part, and the random access information comprises at least one of the following information: first configuration information for indicating random access of frequency domain resources of a random access channel, second configuration information for indicating random access of time domain resources of a random access channel, third configuration information for indicating random access of a random access preamble set;
the network equipment receives a random access preamble sent by the user equipment in an uplink bandwidth part through a random access channel resource, wherein the random access preamble is selected from the random access preamble set by the user equipment, and the random access channel resource is selected from the random access channel resource set by the user equipment; the random access channel resource set comprises frequency domain resources of the random access channel and time domain resources of the random access channel; the uplink bandwidth part is an uplink bandwidth part activated when the user equipment performs a random access process;
The network device sending a random access response to the user device on a first downlink bandwidth portion; the first downlink bandwidth part is a downlink bandwidth part corresponding to the uplink bandwidth part; the random access response is received by the user equipment on the first downlink bandwidth portion, wherein the first downlink bandwidth portion is converted by the user equipment from a second downlink bandwidth portion activated when initiating a random access procedure.
27. The method of claim 26, wherein the message further comprises configuration information indicating a correspondence of the upstream bandwidth portion and the first downstream bandwidth portion.
28. The method according to claim 26 or 27, wherein at least one of the set of random access preambles and the set of random access channel resources corresponds to a first set of control resources of the first downlink bandwidth portion, the first set of control resources indicating a time-frequency domain resource set for which the user device receives or searches for a downlink control channel;
the downlink control channel is used for scheduling any downlink transmission and/or uplink transmission, or the downlink control channel is used for scheduling at least one of random access procedure message two transmission, random access procedure message triple transmission and random access procedure message four transmission, the random access procedure message two is a random access response message, the random access procedure message three is uplink transmission scheduled for the first time, and the random access procedure message four is a random access contention resolution message.
29. The method of claim 26, wherein the random access information includes only the first configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment;
the set of random access preambles is the same as a set of random access preambles configured on the second uplink bandwidth portion of the user equipment.
30. The method of claim 26, wherein the random access information includes only the second configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the frequency domain resource of the random access channel in the random access channel resource set is N physical resource blocks in the center of the uplink bandwidth part, wherein N is a predefined positive integer;
The set of random access preambles is the same as a set of random access preambles configured on a second uplink bandwidth portion of the user equipment.
31. The method of claim 26, wherein the random access information includes only the third configuration information;
in response to this, the control unit,
the random access preamble set is a random access preamble set indicated by the third configuration information;
the frequency domain resource of the random access channel in the random access channel resource set is N physical resource blocks in the center of the uplink bandwidth part, wherein N is a predefined positive integer;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
32. The method of claim 26, wherein the random access information comprises the first configuration information and the second configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
The set of random access preambles is the same as a set of random access preambles configured on a second uplink bandwidth portion of the user equipment.
33. The method of claim 26, wherein the random access information comprises first configuration information and third configuration information of the random access;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the random access preamble set is a random access preamble set indicated by the third configuration information of the random access;
the time domain resource of the random access channel in the random access channel resource set is the same as the time domain resource of the random access channel configured on the second uplink bandwidth part of the user equipment.
34. The method of claim 26, wherein the random access information comprises the second configuration information and the third configuration information;
in a corresponding manner,
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
The random access preamble set is a random access preamble set indicated by the third configuration information;
the frequency domain resources of the random access channel in the random access channel resource set are central N physical resource blocks of the uplink bandwidth part, wherein N is a predefined positive integer.
35. The method of claim 26, wherein the random access information comprises the first configuration information, the second configuration information, and the third configuration information;
in a corresponding manner,
the frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel indicated by the first configuration information;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel indicated by the second configuration information;
the random access preamble set is the random access preamble set indicated by the third configuration information.
36. The method according to any of claims 29-33, wherein the second upstream bandwidth portion is:
an initial uplink bandwidth part of the user equipment on a serving cell;
or a first active uplink bandwidth portion of the user equipment on the serving cell;
Or a default uplink bandwidth part of the user equipment on the service cell;
or the network equipment configures or indicates the uplink bandwidth part for the user equipment through special signaling;
and the serving cell sends the random access preamble to the user equipment.
37. The method of claim 26, wherein the method further comprises:
the network device receives the random access preamble sent by the user device on the uplink bandwidth part through the random access channel resource.
38. The method according to claim 26, wherein the first downlink bandwidth portion is a downlink bandwidth portion corresponding to a fourth uplink bandwidth portion of the ue;
the fourth uplink bandwidth part is an uplink bandwidth part in which the user equipment is configured with a random access preamble set and a random access channel resource set on a serving cell;
the random access preamble set is a random access preamble set configured on the fourth uplink bandwidth part;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel configured on the fourth uplink bandwidth part;
The frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel configured on the fourth uplink bandwidth part;
accordingly, the network device receives a random access preamble sent by the user device through the random access channel resource, including:
the network device receives the random access preamble sent by the user device on the fourth uplink bandwidth portion through the random access channel resource.
39. The method of claim 27, wherein the network device receiving the random access preamble transmitted by the user device over the random access channel resource in the uplink bandwidth portion comprises:
the network device receives the random access preamble sent by the user device on a sixth uplink bandwidth part through the random access channel resource;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the random access preamble set is a random access preamble set configured on the sixth uplink bandwidth part;
the time domain resource of the random access channel in the random access channel resource set is the time domain resource of the random access channel configured on the sixth uplink bandwidth part;
The frequency domain resource of the random access channel in the random access channel resource set is the frequency domain resource of the random access channel configured on the sixth uplink bandwidth part.
40. A user device, the user device comprising: a memory and a processor;
the memory is configured to store program instructions and the processor is configured to invoke the program instructions in the memory to perform the method steps of any of claims 1-25.
41. A network device, the network device comprising: a memory and a processor;
the memory is configured to store program instructions and the processor is configured to invoke the program instructions in the memory to perform the method steps of any of claims 26-39.
42. A chip for a user equipment, the chip comprising: at least one communication interface, at least one processor, at least one memory, wherein the communication interface, the processor, and the memory are interconnected by a circuit, the processor invoking instructions stored in the memory to perform the method steps of any of claims 1-25.
43. A chip for a network device, the chip comprising: at least one communication interface, at least one processor, at least one memory, wherein the communication interface, the processor, and the memory are interconnected by a circuit, the processor invoking instructions stored in the memory to perform the method steps of any of claims 26-39.
44. A computer readable medium storing a computer program comprising instructions for performing the method of any one of claims 1-25.
45. A computer readable medium storing a computer program comprising instructions for performing the method of any one of claims 26-39.
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| WO2019194652A1 (en) | 2018-04-05 | 2019-10-10 | 엘지전자 주식회사 | Method for transmitting and receiving signal in wireless communication system supporting unlicensed band, and apparatus supporting same |
| WO2020034159A1 (en) * | 2018-08-16 | 2020-02-20 | 北京小米移动软件有限公司 | Bandwidth part adjustment method and bandwidth part adjustment apparatus |
| WO2020220338A1 (en) * | 2019-04-30 | 2020-11-05 | Nokia Shanghai Bell Co., Ltd. | Random access message retransmission in unlicensed band |
| CN112804754B (en) * | 2019-11-14 | 2022-09-13 | 维沃移动通信有限公司 | Resource determination method, resource configuration method, terminal and network equipment |
| EP4064783A4 (en) * | 2019-11-20 | 2022-11-09 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for random access, terminal device, and network device |
| CN113766660B (en) * | 2020-06-04 | 2024-02-09 | 大唐移动通信设备有限公司 | SR sending method and terminal |
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